Fix bugs for plugins and themes

injector/src/preload.js

@@ -12,6 +12,7 @@ Object.defineProperty(window, "webpackJsonp", {
 electron.webFrame.top.context.global = electron.webFrame.top.context;
 electron.webFrame.top.context.require = require;
 electron.webFrame.top.context.process = process;
+electron.webFrame.top.context.Buffer = Buffer;
 
 // Load Discord's original preload
 const preload = process.env.DISCORD_PRELOAD;

renderer/src/modules/thememanager.js

@@ -55,6 +55,7 @@ export default new class ThemeManager extends AddonManager {
     /* Overrides */
     getFileModification(module, fileContent, meta) {
         meta.css = fileContent;
+        if (meta.format == "json") meta.css = meta.css.split("\n").slice(1).join("\n");
         return `module.exports = ${JSON.stringify(meta)};`;
     }