diff --git a/check_process b/check_process
index 1e20307..a04343b 100644
--- a/check_process
+++ b/check_process
@@ -1,5 +1,4 @@
 ;; Test complet
-	auto_remove=1
 	; Manifest
 		domain="domain.tld"	(DOMAIN)
 		path="/path"	(PATH)
@@ -16,14 +15,19 @@
 		multi_instance=0
 		incorrect_path=1
 		port_already_use=0
+		change_url=0
 ;;; Levels
 	Level 1=auto
 	Level 2=auto
 	Level 3=auto
 	Level 4=na
-	Level 5=auto
+# Level 5: https://github.com/YunoHost-Apps/searx_ynh/issues/17
+	Level 5=1
 	Level 6=auto
 	Level 7=auto
 	Level 8=0
 	Level 9=0
 	Level 10=0
+;;; Options
+Email=
+Notification=none
diff --git a/manifest.json b/manifest.json
index 643c7dd..5a33bc4 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,9 +2,6 @@
 	"name": "Searx",
 	"id": "searx",
 	"packaging_format": 1,
-	"requirements": {
-		"yunohost": ">= 2.4"
-	},
 	"description": {
 		"en": "A privacy-respecting, hackable metasearch engine",
 		"fr": "Un méta-moteur de recherche respectueux de la vie privée et bidouillable", 
@@ -17,6 +14,9 @@
 		"name": "opi",
 		"email": "opi@zeropi.net"
 	},
+	"requirements": {
+        "yunohost": ">= 2.7.2"
+	},
 	"multi_instance": false,
 	"services": [
 		"nginx",
diff --git a/scripts/_common.sh b/scripts/_common.sh
deleted file mode 100755
index 17bdf33..0000000
--- a/scripts/_common.sh
+++ /dev/null
@@ -1,502 +0,0 @@
-#!/bin/bash
-
-#=================================================
-#=================================================
-# TESTING
-#=================================================
-#=================================================
-
-ynh_nginx_config () {
-	finalnginxconf="/etc/nginx/conf.d/$domain.d/$app.conf"
-	ynh_backup_if_checksum_is_different "$finalnginxconf" 1
-	sudo cp ../conf/nginx.conf "$finalnginxconf"
-
-	# To avoid a break by set -u, use a void substitution ${var:-}. If the variable is not set, it's simply set with an empty variable.
-	# Substitute in a nginx config file only if the variable is not empty
-	if test -n "${path_url:-}"; then
-		ynh_replace_string "__PATH__" "$path_url" "$finalnginxconf"
-	fi
-	if test -n "${domain:-}"; then
-		ynh_replace_string "__DOMAIN__" "$domain" "$finalnginxconf"
-	fi
-	if test -n "${port:-}"; then
-		ynh_replace_string "__PORT__" "$port" "$finalnginxconf"
-	fi
-	if test -n "${app:-}"; then
-		ynh_replace_string "__NAME__" "$app" "$finalnginxconf"
-	fi
-	if test -n "${final_path:-}"; then
-		ynh_replace_string "__FINALPATH__" "$final_path" "$finalnginxconf"
-	fi
-	ynh_store_file_checksum "$finalnginxconf"
-
-	sudo systemctl reload nginx
-}
-
-ynh_remove_nginx_config () {
-	ynh_secure_remove "/etc/nginx/conf.d/$domain.d/$app.conf"
-	sudo systemctl reload nginx
-}
-
-#=================================================
-#=================================================
-
-#=================================================
-# CHECKING
-#=================================================
-
-CHECK_DOMAINPATH () {	# Vérifie la disponibilité du path et du domaine.
-	if sudo yunohost app --help | grep --quiet url-available
-	then
-		# Check availability of a web path
-		ynh_webpath_available $domain $path_url
-		# Register/book a web path for an app
-		ynh_webpath_register $app $domain $path_url
-	else
-		# Use the legacy command
-		sudo yunohost app checkurl $domain$path_url -a $app
-	fi
-}
-
-#=================================================
-# DISPLAYING
-#=================================================
-
-WARNING () {	# Écrit sur le canal d'erreur pour passer en warning.
-	$@ >&2
-}
-
-QUIET () {	# Redirige la sortie standard dans /dev/null
-	$@ > /dev/null
-}
-
-#=================================================
-# BACKUP
-#=================================================
-
-BACKUP_FAIL_UPGRADE () {
-	WARNING echo "Upgrade failed."
-	app_bck=${app//_/-}	# Replace all '_' by '-'
-	if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$backup_number; then	# Vérifie l'existence de l'archive avant de supprimer l'application et de restaurer
-		sudo yunohost app remove $app	# Supprime l'application avant de la restaurer.
-		sudo yunohost backup restore --ignore-hooks $app_bck-pre-upgrade$backup_number --apps $app --force	# Restore the backup if upgrade failed
-		ynh_die "The app was restored to the way it was before the failed upgrade."
-	fi
-}
-
-BACKUP_BEFORE_UPGRADE () {	# Backup the current version of the app, restore it if the upgrade fails
-	backup_number=1
-	old_backup_number=2
-	app_bck=${app//_/-}	# Replace all '_' by '-'
-	if sudo yunohost backup list | grep -q $app_bck-pre-upgrade1; then	# Vérifie l'existence d'une archive déjà numéroté à 1.
-		backup_number=2	# Et passe le numéro de l'archive à 2
-		old_backup_number=1
-	fi
-
-	sudo yunohost backup create --ignore-hooks --apps $app --name $app_bck-pre-upgrade$backup_number	# Créer un backup différent de celui existant.
-	if [ "$?" -eq 0 ]; then	# Si le backup est un succès, supprime l'archive précédente.
-		if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$old_backup_number; then	# Vérifie l'existence de l'ancienne archive avant de la supprimer, pour éviter une erreur.
-			QUIET sudo yunohost backup delete $app_bck-pre-upgrade$old_backup_number
-		fi
-	else	# Si le backup a échoué
-		ynh_die "Backup failed, the upgrade process was aborted."
-	fi
-}
-
-HUMAN_SIZE () {	# Transforme une taille en Ko en une taille lisible pour un humain
-	human=$(numfmt --to=iec --from-unit=1K $1)
-	echo $human
-}
-
-CHECK_SIZE () {	# Vérifie avant chaque backup que l'espace est suffisant
-	file_to_analyse=$1
-	backup_size=$(sudo du --summarize "$file_to_analyse" | cut -f1)
-	free_space=$(sudo df --output=avail "/home/yunohost.backup" | sed 1d)
-
-	if [ $free_space -le $backup_size ]
-	then
-		WARNING echo "Espace insuffisant pour sauvegarder $file_to_analyse."
-		WARNING echo "Espace disponible: $(HUMAN_SIZE $free_space)"
-		ynh_die "Espace nécessaire: $(HUMAN_SIZE $backup_size)"
-	fi
-}
-
-# Ce helper est temporaire et sert de remplacement à la véritable fonction ynh_restore_file. Le temps qu'elle arrive...
-ynh_restore_file () {
-	if [ -f "$1" ]; then
-		ynh_die "There is already a file at this path: $1"
-	fi
-	sudo cp -a "${YNH_APP_BACKUP_DIR}$1" "$1"
-}
-
-#=================================================
-#=================================================
-# FUTUR YNH HELPERS
-#=================================================
-# Importer ce fichier de fonction avant celui des helpers officiel
-# Ainsi, les officiels prendront le pas sur ceux-ci le cas échéant
-#=================================================
-
-# Normalize the url path syntax
-# Handle the slash at the beginning of path and its absence at ending
-# Return a normalized url path
-#
-# example: url_path=$(ynh_normalize_url_path $url_path)
-#          ynh_normalize_url_path example -> /example
-#          ynh_normalize_url_path /example -> /example
-#          ynh_normalize_url_path /example/ -> /example
-#          ynh_normalize_url_path / -> /
-#
-# usage: ynh_normalize_url_path path_to_normalize
-# | arg: url_path_to_normalize - URL path to normalize before using it
-ynh_normalize_url_path () {
-	path_url=$1
-	test -n "$path_url" || ynh_die "ynh_normalize_url_path expect a URL path as first argument and received nothing."
-	if [ "${path_url:0:1}" != "/" ]; then    # If the first character is not a /
-		path_url="/$path_url"    # Add / at begin of path variable
-	fi
-	if [ "${path_url:${#path_url}-1}" == "/" ] && [ ${#path_url} -gt 1 ]; then    # If the last character is a / and that not the only character.
-		path_url="${path_url:0:${#path_url}-1}"	# Delete the last character
-	fi
-	echo $path_url
-}
-
-# Manage a fail of the script
-#
-# Print a warning to inform that the script was failed
-# Execute the ynh_clean_setup function if used in the app script
-#
-# usage of ynh_clean_setup function
-# This function provide a way to clean some residual of installation that not managed by remove script.
-# To use it, simply add in your script:
-# ynh_clean_setup () {
-#        instructions...
-# }
-# This function is optionnal.
-#
-# Usage: ynh_exit_properly is used only by the helper ynh_abort_if_errors.
-# You must not use it directly.
-ynh_exit_properly () {
-	exit_code=$?
-	if [ "$exit_code" -eq 0 ]; then
-			exit 0	# Exit without error if the script ended correctly
-	fi
-
-	trap '' EXIT	# Ignore new exit signals
-	set +eu	# Do not exit anymore if a command fail or if a variable is empty
-
-	echo -e "!!\n  $app's script has encountered an error. Its execution was cancelled.\n!!" >&2
-
-	if type -t ynh_clean_setup > /dev/null; then	# Check if the function exist in the app script.
-		ynh_clean_setup	# Call the function to do specific cleaning for the app.
-	fi
-
-	ynh_die	# Exit with error status
-}
-
-# Exit if an error occurs during the execution of the script.
-#
-# Stop immediatly the execution if an error occured or if a empty variable is used.
-# The execution of the script is derivate to ynh_exit_properly function before exit.
-#
-# Usage: ynh_abort_if_errors
-ynh_abort_if_errors () {
-	set -eu	# Exit if a command fail, and if a variable is used unset.
-	trap ynh_exit_properly EXIT	# Capturing exit signals on shell script
-}
-
-# Define and install dependencies with a equivs control file
-# This helper can/should only be called once per app
-#
-# usage: ynh_install_app_dependencies dep [dep [...]]
-# | arg: dep - the package name to install in dependence
-ynh_install_app_dependencies () {
-    dependencies=$@
-    manifest_path="../manifest.json"
-    if [ ! -e "$manifest_path" ]; then
-    	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
-    fi
-    version=$(sudo grep '\"version\": ' "$manifest_path" | cut -d '"' -f 4)	# Retrieve the version number in the manifest file.
-    dep_app=${app//_/-}	# Replace all '_' by '-'
-
-    if ynh_package_is_installed "${dep_app}-ynh-deps"; then
-		echo "A package named ${dep_app}-ynh-deps is already installed" >&2
-    else
-        cat > ./${dep_app}-ynh-deps.control << EOF	# Make a control file for equivs-build
-Section: misc
-Priority: optional
-Package: ${dep_app}-ynh-deps
-Version: ${version}
-Depends: ${dependencies// /, }
-Architecture: all
-Description: Fake package for ${app} (YunoHost app) dependencies
- This meta-package is only responsible of installing its dependencies.
-EOF
-        ynh_package_install_from_equivs ./${dep_app}-ynh-deps.control \
-            || ynh_die "Unable to install dependencies"	# Install the fake package and its dependencies
-        ynh_app_setting_set $app apt_dependencies $dependencies
-    fi
-}
-
-# Remove fake package and its dependencies
-#
-# Dependencies will removed only if no other package need them.
-#
-# usage: ynh_remove_app_dependencies
-ynh_remove_app_dependencies () {
-    dep_app=${app//_/-}	# Replace all '_' by '-'
-    ynh_package_autoremove ${dep_app}-ynh-deps	# Remove the fake package and its dependencies if they not still used.
-}
-
-# Create a system user
-#
-# usage: ynh_system_user_create user_name [home_dir]
-# | arg: user_name - Name of the system user that will be create
-# | arg: home_dir - Path of the home dir for the user. Usually the final path of the app. If this argument is omitted, the user will be created without home
-ynh_system_user_create () {
-	if ! ynh_system_user_exists "$1"	# Check if the user exists on the system
-	then	# If the user doesn't exist
-		if [ $# -ge 2 ]; then	# If a home dir is mentioned
-			user_home_dir="-d $2"
-		else
-			user_home_dir="--no-create-home"
-		fi
-		sudo useradd $user_home_dir --system --user-group $1 --shell /usr/sbin/nologin || ynh_die "Unable to create $1 system account"
-	fi
-}
-
-# Delete a system user
-#
-# usage: ynh_system_user_delete user_name
-# | arg: user_name - Name of the system user that will be create
-ynh_system_user_delete () {
-    if ynh_system_user_exists "$1"	# Check if the user exists on the system
-    then
-		echo "Remove the user $1" >&2
-		sudo userdel $1
-	else
-		echo "The user $1 was not found" >&2
-    fi
-}
-
-# Substitute/replace a string by another in a file
-#
-# usage: ynh_replace_string match_string replace_string target_file
-# | arg: match_string - String to be searched and replaced in the file
-# | arg: replace_string - String that will replace matches
-# | arg: target_file - File in which the string will be replaced.
-ynh_replace_string () {
-	delimit=@
-	match_string=${1//${delimit}/"\\${delimit}"}	# Escape the delimiter if it's in the string.
-	replace_string=${2//${delimit}/"\\${delimit}"}
-	workfile=$3
-
-	sudo sed --in-place "s${delimit}${match_string}${delimit}${replace_string}${delimit}g" "$workfile"
-}
-
-# Remove a file or a directory securely
-#
-# usage: ynh_secure_remove path_to_remove
-# | arg: path_to_remove - File or directory to remove
-ynh_secure_remove () {
-	path_to_remove=$1
-	forbidden_path=" \
-	/var/www \
-	/home/yunohost.app"
-
-	if [[ "$forbidden_path" =~ "$path_to_remove" \
-		# Match all paths or subpaths in $forbidden_path
-		|| "$path_to_remove" =~ ^/[[:alnum:]]+$ \
-		# Match all first level paths from / (Like /var, /root, etc...)
-		|| "${path_to_remove:${#path_to_remove}-1}" = "/" ]]
-		# Match if the path finishes by /. Because it seems there is an empty variable
-	then
-		echo "Avoid deleting $path_to_remove." >&2
-	else
-		if [ -e "$path_to_remove" ]
-		then
-			sudo rm -R "$path_to_remove"
-		else
-			echo "$path_to_remove wasn't deleted because it doesn't exist." >&2
-		fi
-	fi
-}
-
-# Download, check integrity, uncompress and patch the source from app.src
-#
-# The file conf/app.src need to contains:
-# 
-# SOURCE_URL=Address to download the app archive
-# SOURCE_SUM=Control sum
-# # (Optional) Programm to check the integrity (sha256sum, md5sum$YNH_EXECUTION_DIR/...)
-# # default: sha256
-# SOURCE_SUM_PRG=sha256
-# # (Optional) Archive format
-# # default: tar.gz
-# SOURCE_FORMAT=tar.gz
-# # (Optional) Put false if source are directly in the archive root
-# # default: true
-# SOURCE_IN_SUBDIR=false
-# # (Optionnal) Name of the local archive (offline setup support)
-# # default: ${src_id}.${src_format}
-# SOURCE_FILENAME=example.tar.gz 
-#
-# Details:
-# This helper download sources from SOURCE_URL if there is no local source
-# archive in /opt/yunohost-apps-src/APP_ID/SOURCE_FILENAME
-# 
-# Next, it check the integrity with "SOURCE_SUM_PRG -c --status" command.
-# 
-# If it's ok, the source archive will be uncompress in $dest_dir. If the
-# SOURCE_IN_SUBDIR is true, the first level directory of the archive will be
-# removed.
-#
-# Finally, patches named sources/patches/${src_id}-*.patch and extra files in
-# sources/extra_files/$src_id will be applyed to dest_dir
-#
-#
-# usage: ynh_setup_source dest_dir [source_id]
-# | arg: dest_dir  - Directory where to setup sources
-# | arg: source_id - Name of the app, if the package contains more than one app
-YNH_EXECUTION_DIR="."
-ynh_setup_source () {
-    local dest_dir=$1
-    local src_id=${2:-app} # If the argument is not given, source_id equal "app"
-
-    # Load value from configuration file (see above for a small doc about this file
-    # format)
-    local src_url=$(grep 'SOURCE_URL=' "$YNH_EXECUTION_DIR/../conf/${src_id}.src" | cut -d= -f2-)
-    local src_sum=$(grep 'SOURCE_SUM=' "$YNH_EXECUTION_DIR/../conf/${src_id}.src" | cut -d= -f2-)
-    local src_sumprg=$(grep 'SOURCE_SUM_PRG=' "$YNH_EXECUTION_DIR/../conf/${src_id}.src" | cut -d= -f2-)
-    local src_format=$(grep 'SOURCE_FORMAT=' "$YNH_EXECUTION_DIR/../conf/${src_id}.src" | cut -d= -f2-)
-    local src_in_subdir=$(grep 'SOURCE_IN_SUBDIR=' "$YNH_EXECUTION_DIR/../conf/${src_id}.src" | cut -d= -f2-)
-    local src_filename=$(grep 'SOURCE_FILENAME=' "$YNH_EXECUTION_DIR/../conf/${src_id}.src" | cut -d= -f2-)
-
-    # Default value
-    src_sumprg=${src_sumprg:-sha256sum}
-    src_in_subdir=${src_in_subdir:-true}
-    src_format=${src_format:-tar.gz}
-    src_format=$(echo "$src_format" | tr '[:upper:]' '[:lower:]')
-    if [ "$src_filename" = "" ] ; then
-        src_filename="${src_id}.${src_format}"
-    fi
-    local local_src="/opt/yunohost-apps-src/${YNH_APP_ID}/${src_filename}"
-
-    if test -e "$local_src"
-    then    # Use the local source file if it is present
-        cp $local_src $src_filename
-    else    # If not, download the source
-        wget -nv -O $src_filename $src_url
-    fi
-
-    # Check the control sum
-    echo "${src_sum} ${src_filename}" | ${src_sumprg} -c --status \
-        || ynh_die "Corrupt source"
-
-    # Extract source into the app dir
-    sudo mkdir -p "$dest_dir"
-    if [ "$src_format" = "zip" ]
-    then 
-        # Zip format
-        # Using of a temp directory, because unzip doesn't manage --strip-components
-        if $src_in_subdir ; then
-            local tmp_dir=$(mktemp -d)
-            sudo unzip -quo $src_filename -d "$tmp_dir"
-            sudo cp -a $tmp_dir/*/. "$dest_dir"
-            ynh_secure_remove "$tmp_dir"
-        else
-            sudo unzip -quo $src_filename -d "$dest_dir"
-        fi
-    else
-        local strip=""
-        if $src_in_subdir ; then
-            strip="--strip-components 1"
-        fi
-        if [[ "$src_format" =~ ^tar.gz|tar.bz2|tar.xz$ ]] ; then
-            sudo tar -xf $src_filename -C "$dest_dir" $strip
-        else
-            ynh_die "Archive format unrecognized."
-        fi
-    fi
-
-    # Apply patches
-    if (( $(find $YNH_EXECUTION_DIR/../sources/patches/ -type f -name "${src_id}-*.patch" 2> /dev/null | wc -l) > "0" )); then
-        local old_dir=$(pwd)
-        (cd "$dest_dir" \
-            && for p in $YNH_EXECUTION_DIR/../sources/patches/${src_id}-*.patch; do \
-                sudo patch -p1 < $p; done) \
-            || ynh_die "Unable to apply patches"
-        cd $old_dir
-    fi
-
-    # Add supplementary files
-    if test -e "$YNH_EXECUTION_DIR/../sources/extra_files/${src_id}"; then
-        sudo cp -a $YNH_EXECUTION_DIR/../sources/extra_files/$src_id/. "$dest_dir"
-    fi
-}
-
-# Check availability of a web path
-#
-# example: ynh_webpath_available some.domain.tld /coffee
-#
-# usage: ynh_webpath_available domain path
-# | arg: domain - the domain/host of the url
-# | arg: path - the web path to check the availability of
-ynh_webpath_available () {
-	local domain=$1
-	local path=$2
-	sudo yunohost domain url-available $domain $path
-}
-
-# Register/book a web path for an app
-#
-# example: ynh_webpath_register wordpress some.domain.tld /coffee
-#
-# usage: ynh_webpath_register app domain path
-# | arg: app - the app for which the domain should be registered
-# | arg: domain - the domain/host of the web path
-# | arg: path - the web path to be registered
-ynh_webpath_register () {
-	local app=$1
-	local domain=$2
-	local path=$3
-	sudo yunohost app register-url $app $domain $path
-}
-
-# Calculate and store a file checksum into the app settings
-#
-# $app should be defined when calling this helper
-#
-# usage: ynh_store_file_checksum file
-# | arg: file - The file on which the checksum will performed, then stored.
-ynh_store_file_checksum () {
-	local checksum_setting_name=checksum_${1//[\/ ]/_}	# Replace all '/' and ' ' by '_'
-	ynh_app_setting_set $app $checksum_setting_name $(sudo md5sum "$1" | cut -d' ' -f1)
-}
-
-# Verify the checksum and backup the file if it's different
-# This helper is primarily meant to allow to easily backup personalised/manually 
-# modified config files.
-#
-# $app should be defined when calling this helper
-#
-# usage: ynh_backup_if_checksum_is_different file
-# | arg: file - The file on which the checksum test will be perfomed.
-#
-# | ret: Return the name a the backup file, or nothing
-ynh_backup_if_checksum_is_different () {
-	local file=$1
-	local checksum_setting_name=checksum_${file//[\/ ]/_}	# Replace all '/' and ' ' by '_'
-	local checksum_value=$(ynh_app_setting_get $app $checksum_setting_name)
-	if [ -n "$checksum_value" ]
-	then	# Proceed only if a value was stored into the app settings
-		if ! echo "$checksum_value $file" | sudo md5sum -c --status
-		then	# If the checksum is now different
-			backup_file="/home/yunohost.conf/backup/$file.backup.$(date '+%Y%m%d.%H%M%S')"
-			sudo mkdir -p "$(dirname "$backup_file")"
-			sudo cp -a "$file" "$backup_file"	# Backup the current file
-			echo "File $file has been manually modified since the installation or last upgrade. So it has been duplicated in $backup_file" >&2
-			echo "$backup_file"	# Return the name of the backup file
-		fi
-	fi
-}
diff --git a/scripts/backup b/scripts/backup
index 6781d9d..96afb05 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -13,12 +13,12 @@ set -eu
 # IMPORT GENERIC HELPERS
 #=================================================
 
-if [ ! -e _common.sh ]; then
-	# Rapatrie le fichier de fonctions si il n'est pas dans le dossier courant
-	sudo cp ../settings/scripts/_common.sh ./_common.sh
-	sudo chmod a+rx _common.sh
-fi
-source _common.sh
+# if [ ! -e _common.sh ]; then
+# 	# Rapatrie le fichier de fonctions si il n'est pas dans le dossier courant
+# 	cp ../settings/scripts/_common.sh ./_common.sh
+# 	chmod a+rx _common.sh
+# fi
+# source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -37,14 +37,13 @@ domain=$(ynh_app_setting_get $app domain)
 # BACKUP OF THE MAIN DIR OF THE APP
 #=================================================
 
-CHECK_SIZE "$final_path"
-ynh_backup "$final_path" "${YNH_APP_BACKUP_DIR}$final_path"
+ynh_backup "$final_path"
 
 #=================================================
 # BACKUP OF THE NGINX CONFIGURATION
 #=================================================
 
-ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "${YNH_APP_BACKUP_DIR}/etc/nginx/conf.d/$domain.d/$app.conf"
+ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf"
 
 #=================================================
 # SPECIFIC BACKUP
@@ -52,4 +51,4 @@ ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "${YNH_APP_BACKUP_DIR}/etc/ng
 # BACKUP OF THE UWSGI CONFIG
 #=================================================
 
-ynh_backup "/etc/uwsgi/apps-available/$app.ini" "${YNH_APP_BACKUP_DIR}/etc/uwsgi/apps-available/$app.ini"
+ynh_backup "/etc/uwsgi/apps-available/$app.ini"
diff --git a/scripts/install b/scripts/install
index 8b41762..4e898b4 100644
--- a/scripts/install
+++ b/scripts/install
@@ -6,14 +6,15 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-source _common.sh
+# source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
 # MANAGE FAILURE OF THE SCRIPT
 #=================================================
 
-ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est détectée.
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
 
 #=================================================
 # RETRIEVE ARGUMENTS FROM THE MANIFEST
@@ -29,12 +30,17 @@ app=$YNH_APP_INSTANCE_NAME
 # CHECK IF THE APP CAN BE INSTALLED WITH THIS ARGS
 #=================================================
 
-path_url=$(ynh_normalize_url_path $path_url)	# Vérifie et corrige la syntaxe du path.
-CHECK_DOMAINPATH	# Vérifie la disponibilité du path et du domaine.
-# Check final_path
 final_path="/opt/yunohost/$app"
 test ! -e "$final_path" || ynh_die "This path already contains a folder"
 
+# Normalize the url path syntax
+path_url=$(ynh_normalize_url_path $path_url)
+
+# Check web path availability
+ynh_webpath_available $domain $path_url
+# Register (book) web path
+ynh_webpath_register $app $domain $path_url
+
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
@@ -55,11 +61,11 @@ ynh_install_app_dependencies git build-essential libxslt-dev python-dev python-v
 # NGINX CONFIGURATION
 #=================================================
 
-ynh_nginx_config
+ynh_add_nginx_config
 if [ "$path_url" = "/" ]
 then
 	ynh_replace_string "__PATH_NO_ROOT__" "" /etc/nginx/conf.d/$domain.d/$app.conf
-	sudo sed --in-place '/#noroot*/d' /etc/nginx/conf.d/$domain.d/$app.conf
+	sed --in-place '/#noroot*/d' /etc/nginx/conf.d/$domain.d/$app.conf
 else
 	ynh_replace_string "#noroot" "" /etc/nginx/conf.d/$domain.d/$app.conf
 	ynh_replace_string "__PATH_NO_ROOT__" "$path_url" /etc/nginx/conf.d/$domain.d/$app.conf
@@ -70,14 +76,16 @@ ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
 # CREATE DEDICATED USER
 #=================================================
 
-ynh_system_user_create $app	# Créer un utilisateur système dédié à l'app
+# Create a system user
+ynh_system_user_create $app
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 
 ynh_app_setting_set $app final_path $final_path
-ynh_setup_source "$final_path"	# Télécharge la source, décompresse et copie dans $final_path
+# Download, check integrity, uncompress and patch the source from app.src
+ynh_setup_source "$final_path"
 
 #=================================================
 # SPECIFIC SETUP
@@ -85,14 +93,14 @@ ynh_setup_source "$final_path"	# Télécharge la source, décompresse et copie d
 # INSTALL SEARX IN A VIRTUALENV
 #=================================================
 
-sudo virtualenv --system-site-packages "$final_path"
-sudo bash -c "source $final_path/bin/activate && pip install --requirement $final_path/requirements-ynh.txt"
+virtualenv --system-site-packages "$final_path"
+bash -c "source $final_path/bin/activate && pip install --requirement $final_path/requirements-ynh.txt"
 
 #=================================================
 # CONFIGURE SEARX
 #=================================================
 
-sudo cp ../conf/settings.yml "$final_path/searx/"
+cp ../conf/settings.yml "$final_path/searx/"
 
 # Generate a secret key
 ynh_replace_string "__SECRETKEY__" "$(ynh_string_random)" "$final_path/searx/settings.yml"
@@ -110,24 +118,24 @@ ynh_store_file_checksum "$final_path/searx/settings.yml"
 # SET PERMISSIONS ON SEARX DIRECTORY
 #=================================================
 
-sudo chown $app: --recursive "$final_path"
+chown $app: --recursive "$final_path"
 
 #=================================================
 # CONFIGURE UWSGI FOR SEARX
 #=================================================
 
-sudo cp ../conf/searx.ini /etc/uwsgi/apps-available/$app.ini
+cp ../conf/searx.ini /etc/uwsgi/apps-available/$app.ini
 ynh_replace_string "__APP__" "$app" /etc/uwsgi/apps-available/$app.ini
 ynh_replace_string "__FINALPATH__" "$final_path" /etc/uwsgi/apps-available/$app.ini
-sudo ln -s /etc/uwsgi/apps-available/$app.ini /etc/uwsgi/apps-enabled/$app.ini
+ln -s /etc/uwsgi/apps-available/$app.ini /etc/uwsgi/apps-enabled/$app.ini
 
 #=================================================
 # ENABLE UWSGI SERVICE IN ADMIN PANEL
 #=================================================
 
-sudo systemctl restart uwsgi
+systemctl restart uwsgi
 # Ajoute le service au monitoring de Yunohost.
-sudo yunohost service add uwsgi --log "/var/log/uwsgi/app/$app.log"
+yunohost service add uwsgi --log "/var/log/uwsgi/app/$app.log"
 
 #=================================================
 # GENERIC FINALISATION
@@ -135,6 +143,7 @@ sudo yunohost service add uwsgi --log "/var/log/uwsgi/app/$app.log"
 # SETUP SSOWAT
 #=================================================
 
+# Make app public if necessary
 if [ $is_public -eq 1 ]
 then
 	ynh_app_setting_set $app skipped_uris "/"
@@ -144,4 +153,4 @@ fi
 # RELOAD NGINX
 #=================================================
 
-sudo systemctl reload nginx
+systemctl reload nginx
diff --git a/scripts/remove b/scripts/remove
index 8319fdd..611f594 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -6,7 +6,7 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-source _common.sh
+# source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -23,8 +23,8 @@ domain=$(ynh_app_setting_get $app domain)
 # STOP AND REMOVE SERVICE
 #=================================================
 
-# Suppression de la configuration uwsgi
-sudo systemctl stop uwsgi
+# Remove the uwsgi configuration
+systemctl stop uwsgi
 if [ -h "/etc/uwsgi/apps-enabled/$app.ini" ]; then
 	echo "Delete uwsgi config"
 	ynh_secure_remove "/etc/uwsgi/apps-enabled/$app.ini"
@@ -47,7 +47,8 @@ ynh_secure_remove "/opt/yunohost/$app"
 # REMOVE THE NGINX CONFIGURATION
 #=================================================
 
-ynh_remove_nginx_config	# Suppression de la configuration nginx
+# Remove the dedicated nginx config
+ynh_remove_nginx_config
 
 #=================================================
 # DISABLE SERVICE IN ADMIN PANEL
@@ -56,12 +57,12 @@ ynh_remove_nginx_config	# Suppression de la configuration nginx
 if [ -e /etc/init.d/uwsgi ]
 then
 	# Redémarre le service uwsgi si il n'est pas désinstallé.
-	sudo systemctl start uwsgi
+	systemctl start uwsgi
 else
-	if sudo yunohost service status | grep -q uwsgi	# Test l'existence du service dans Yunohost
+	if yunohost service status | grep -q uwsgi	# Test l'existence du service dans Yunohost
 	then
 		echo "Remove uwsgi service"
-		sudo yunohost service remove uwsgi
+		yunohost service remove uwsgi
 	fi
 fi
 
@@ -71,4 +72,5 @@ fi
 # REMOVE DEDICATED USER
 #=================================================
 
+# Delete a system user
 ynh_system_user_delete $app
diff --git a/scripts/restore b/scripts/restore
index b4211af..ddbe66f 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -13,12 +13,12 @@ set -eu
 # IMPORT GENERIC HELPERS
 #=================================================
 
-if [ ! -e _common.sh ]; then
-	# Rapatrie le fichier de fonctions si il n'est pas dans le dossier courant
-	sudo cp ../settings/scripts/_common.sh ./_common.sh
-	sudo chmod a+rx _common.sh
-fi
-source _common.sh
+# if [ ! -e _common.sh ]; then
+# 	# Rapatrie le fichier de fonctions si il n'est pas dans le dossier courant
+# 	cp ../settings/scripts/_common.sh ./_common.sh
+# 	chmod a+rx _common.sh
+# fi
+# source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -35,7 +35,7 @@ path_url=$(ynh_app_setting_get $app path)
 # CHECK IF THE APP CAN BE RESTORED
 #=================================================
 
-sudo yunohost app checkurl "${domain}${path_url}" -a "$app" \
+ynh_webpath_available $domain $path_url \
 	|| ynh_die "Path not available: ${domain}${path_url}"
 test ! -d $final_path \
 	|| ynh_die "There is already a directory: $final_path "
@@ -52,7 +52,7 @@ ynh_restore_file "/etc/nginx/conf.d/$domain.d/$app.conf"
 # RESTORE OF THE MAIN DIR OF THE APP
 #=================================================
 
-sudo mkdir -p /opt/yunohost
+mkdir -p /opt/yunohost
 ynh_restore_file "$final_path"
 
 #=================================================
@@ -65,7 +65,8 @@ ynh_install_app_dependencies libxslt-dev virtualenv python-pybabel zlib1g-dev li
 # RECREATE OF THE DEDICATED USER
 #=================================================
 
-ynh_system_user_create $app	# Recreate the dedicated user, if not exist
+# Create the dedicated user (if not existing)
+ynh_system_user_create $app
 
 #=================================================
 # SPECIFIC RESTORE
@@ -73,14 +74,14 @@ ynh_system_user_create $app	# Recreate the dedicated user, if not exist
 # RESTORE USER RIGHTS
 #=================================================
 
-sudo chown $app: --recursive "$final_path"
+chown $app: --recursive "$final_path"
 
 #=================================================
 # RESTORE THE UWSGI CONFIG
 #=================================================
 
 ynh_restore_file "/etc/uwsgi/apps-available/$app.ini"
-sudo ln -s /etc/uwsgi/apps-available/$app.ini /etc/uwsgi/apps-enabled/$app.ini
+ln -s /etc/uwsgi/apps-available/$app.ini /etc/uwsgi/apps-enabled/$app.ini
 
 #=================================================
 # GENERIC FINALISATION
@@ -88,5 +89,5 @@ sudo ln -s /etc/uwsgi/apps-available/$app.ini /etc/uwsgi/apps-enabled/$app.ini
 # RELOAD NGINX AND UWSGI
 #=================================================
 
-sudo systemctl restart uwsgi
-sudo systemctl reload nginx
+systemctl restart uwsgi
+systemctl reload nginx
diff --git a/scripts/upgrade b/scripts/upgrade
index 9bb87c4..7c6c81f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -6,7 +6,7 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-source _common.sh
+# source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -24,15 +24,17 @@ final_path=$(ynh_app_setting_get $app final_path)
 # FIX OLD THINGS
 #=================================================
 
+# Fix is_public as a boolean value
 if [ "$is_public" = "Yes" ]; then
-	ynh_app_setting_set $app is_public 1	# Fixe is_public en booléen
+	ynh_app_setting_set $app is_public 1
 	is_public=1
 elif [ "$is_public" = "No" ]; then
 	ynh_app_setting_set $app is_public 0
 	is_public=0
 fi
 
-if [ -z $final_path ]; then	# Si final_path n'est pas renseigné dans app setting
+# If final_path doesn't exist, create it
+if [ -z $final_path ]; then
 	final_path="/opt/yunohost/$app"
 	ynh_app_setting_set $app final_path $final_path
 fi
@@ -41,17 +43,18 @@ fi
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
 
-BACKUP_BEFORE_UPGRADE	# Backup the current version of the app
+ynh_backup_before_upgrade	# Backup the current version of the app
 ynh_clean_setup () {
-	BACKUP_FAIL_UPGRADE	# restore it if the upgrade fails
+	ynh_restore_upgradebackup	# restore it if the upgrade fails
 }
-ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est détectée.
+ynh_abort_if_errors	# Exit if an error occurs during the execution of the script
 
 #=================================================
 # CHECK THE PATH
 #=================================================
 
-path_url=$(ynh_normalize_url_path $path_url)	# Vérifie et corrige la syntaxe du path.
+# Normalize the URL path syntax
+path_url=$(ynh_normalize_url_path $path_url)
 
 #=================================================
 # STANDARD UPGRADE STEPS
@@ -59,17 +62,18 @@ path_url=$(ynh_normalize_url_path $path_url)	# Vérifie et corrige la syntaxe du
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 
-ynh_setup_source "$final_path"	# Télécharge la source, décompresse et copie dans $final_path
+# Download, check integrity, uncompress and patch the source from app.src
+ynh_setup_source "$final_path"
 
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
 
-ynh_nginx_config
+ynh_add_nginx_config
 if [ "$path_url" = "/" ]
 then
 	ynh_replace_string "__PATH_NO_ROOT__" "" /etc/nginx/conf.d/$domain.d/$app.conf
-	sudo sed --in-place '/#noroot*/d' /etc/nginx/conf.d/$domain.d/$app.conf
+	sed --in-place '/#noroot*/d' /etc/nginx/conf.d/$domain.d/$app.conf
 else
 	ynh_replace_string "#noroot" "" /etc/nginx/conf.d/$domain.d/$app.conf
 	ynh_replace_string "__PATH_NO_ROOT__" "$path_url" /etc/nginx/conf.d/$domain.d/$app.conf
@@ -80,7 +84,8 @@ ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
 # CREATE DEDICATED USER
 #=================================================
 
-ynh_system_user_create $app	# Create the dedicated user, if not exist
+# Create a system user
+ynh_system_user_create $app
 
 #=================================================
 # SPECIFIC UPGRADE
@@ -88,17 +93,17 @@ ynh_system_user_create $app	# Create the dedicated user, if not exist
 # UPGRADE SEARX IN ITS VIRTUALENV
 #=================================================
 
-sudo virtualenv --system-site-packages "$final_path"
-sudo bash -c "source $final_path/bin/activate && pip install --requirement $final_path/requirements-ynh.txt --upgrade"
+virtualenv --system-site-packages "$final_path"
+bash -c "source $final_path/bin/activate && pip install --requirement $final_path/requirements-ynh.txt --upgrade"
 
 #=================================================
 # CONFIGURE SEARX
 #=================================================
 
-# Créé un backup du fichier de config si il a été modifié.
+# Verify the checksum and backup the file if it's different
 ynh_backup_if_checksum_is_different "$final_path/searx/settings.yml"
 
-sudo cp ../conf/settings.yml "$final_path/searx/"
+cp ../conf/settings.yml "$final_path/searx/"
 
 # Generate a secret key
 ynh_replace_string "__SECRETKEY__" "$(ynh_string_random)" "$final_path/searx/settings.yml"
@@ -118,21 +123,22 @@ ynh_store_file_checksum "$final_path/searx/settings.yml"
 # SECURING FILES AND DIRECTORIES
 #=================================================
 
-sudo chown $app: --recursive "$final_path"
+chown $app: --recursive "$final_path"
 
 #=================================================
 # CONFIGURE UWSGI FOR SEARX
 #=================================================
 
-sudo cp ../conf/searx.ini /etc/uwsgi/apps-available/$app.ini
+cp ../conf/searx.ini /etc/uwsgi/apps-available/$app.ini
 ynh_replace_string "__APP__" "$app" /etc/uwsgi/apps-available/$app.ini
 ynh_replace_string "__FINALPATH__" "$final_path" /etc/uwsgi/apps-available/$app.ini
-sudo systemctl restart uwsgi
+systemctl restart uwsgi
 
 #=================================================
 # SETUP SSOWAT
 #=================================================
 
+# Make app public if necessary
 if [ $is_public -eq 1 ]
 then
 	ynh_app_setting_set $app skipped_uris "/"
@@ -142,4 +148,4 @@ fi
 # RELOAD NGINX
 #=================================================
 
-sudo systemctl reload nginx
+systemctl reload nginx