firefox: Fix csp (QuickCss, themes, some plugins) (#554)

.github/workflows/build.yml

@@ -42,7 +42,7 @@ jobs:
 
             - name: Clean up obsolete files
               run: |
-                rm -rf dist/extension-unpacked Vencord.user.css vencordDesktopRenderer.css vencordDesktopRenderer.css.map
+                rm -rf dist/*-unpacked Vencord.user.css vencordDesktopRenderer.css vencordDesktopRenderer.css.map
 
             - name: Get some values needed for the release
               id: release_values

.github/workflows/publish.yml

@@ -35,15 +35,15 @@ jobs:
 
             - name: Publish extension
               run: |
-                cd dist/extension-unpacked
-
                 # Do not fail so that even if chrome fails, firefox gets a shot. But also store exit code to fail workflow later
                 EXIT_CODE=0
 
                 # Chrome
+                cd dist/chromium-unpacked
                 pnpx chrome-webstore-upload-cli@2.1.0 upload --auto-publish || EXIT_CODE=$?
 
                 # Firefox
+                cd ../chromium-unpacked
                 npm i -g web-ext@7.4.0 web-ext-submit@7.4.0
                 web-ext-submit || EXIT_CODE=$?
 
@@ -58,4 +58,3 @@ jobs:
                 # Firefox
                 WEB_EXT_API_KEY: ${{ secrets.WEBEXT_USER }}
                 WEB_EXT_API_SECRET: ${{ secrets.WEBEXT_SECRET }}
-

browser/background.js

@@ -0,0 +1,32 @@
+/**
+ * @template T
+ * @param {T[]} arr
+ * @param {(v: T) => boolean} predicate
+ */
+function removeFirst(arr, predicate) {
+    const idx = arr.findIndex(predicate);
+    if (idx !== -1) arr.splice(idx, 1);
+}
+
+chrome.webRequest.onHeadersReceived.addListener(
+    ({ responseHeaders, type, url }) => {
+        if (!responseHeaders) return;
+
+        if (type === "main_frame") {
+            // In main frame requests, the CSP needs to be removed to enable fetching of custom css
+            // as desired by the user
+            removeFirst(responseHeaders, h => h.name.toLowerCase() === "content-security-policy");
+        } else if (type === "stylesheet" && url.startsWith("https://raw.githubusercontent.com")) {
+            // Most users will load css from GitHub, but GitHub doesn't set the correct content type,
+            // so we fix it here
+            removeFirst(responseHeaders, h => h.name.toLowerCase() === "content-type");
+            responseHeaders.push({
+                name: "Content-Type",
+                value: "text/css"
+            });
+        }
+        return { responseHeaders };
+    },
+    { urls: ["https://raw.githubusercontent.com/*", "*://*.discord.com/*"], types: ["main_frame", "stylesheet"] },
+    ["blocking", "responseHeaders"]
+);

browser/manifestv2.json

@@ -0,0 +1,41 @@
+{
+    "manifest_version": 2,
+    "minimum_chrome_version": "91",
+
+    "name": "Vencord Web",
+    "description": "The cutest Discord mod now in your browser",
+    "author": "Vendicated",
+    "homepage_url": "https://github.com/Vendicated/Vencord",
+    "icons": {
+        "128": "icon.png"
+    },
+
+    "permissions": [
+        "webRequest",
+        "webRequestBlocking",
+        "*://*.discord.com/*",
+        "https://raw.githubusercontent.com/*"
+    ],
+
+    "content_scripts": [
+        {
+            "run_at": "document_start",
+            "matches": ["*://*.discord.com/*"],
+            "js": ["content.js"],
+            "all_frames": true
+        }
+    ],
+
+    "background": {
+        "scripts": ["background.js"]
+    },
+
+    "web_accessible_resources": ["dist/Vencord.js", "dist/Vencord.css"],
+
+    "browser_specific_settings": {
+        "gecko": {
+            "id": "vencord-firefox@vendicated.dev",
+            "strict_min_version": "91.0"
+        }
+    }
+}

package.json

@@ -1,7 +1,7 @@
 {
     "name": "vencord",
     "private": "true",
-    "version": "1.1.7",
+    "version": "1.1.8",
     "description": "The cutest Discord client mod",
     "homepage": "https://github.com/Vendicated/Vencord#readme",
     "bugs": {

scripts/build/buildWeb.mjs

@@ -142,6 +142,7 @@ const appendCssRuntime = readFile("dist/Vencord.user.css", "utf-8").then(content
 await Promise.all([
     appendCssRuntime,
     buildPluginZip("extension.zip", ["modifyResponseHeaders.json", "content.js", "manifest.json", "icon.png"], true),
-    buildPluginZip("extension-unpacked", ["modifyResponseHeaders.json", "content.js", "manifest.json", "icon.png"], false),
+    buildPluginZip("chromium-unpacked", ["modifyResponseHeaders.json", "content.js", "manifest.json", "icon.png"], false),
+    buildPluginZip("firefox-unpacked", ["background.js", "content.js", "manifestv2.json", "icon.png"], false),
 ]);