BrowserExtension: Disable CSP

browser/background.js

@@ -1 +1,24 @@
-// could use this in the future
+if (typeof browser === "undefined") {
+    var browser = chrome;
+}
+
+browser.webRequest.onHeadersReceived.addListener(({ responseHeaders, url }) => {
+    const cspIdx = responseHeaders.findIndex(h => h.name === "content-security-policy");
+    if (cspIdx !== -1)
+        responseHeaders.splice(cspIdx, 1);
+
+    if (url.endsWith(".css")) {
+        const contentType = responseHeaders.find(h => h.name === "content-type");
+        if (contentType)
+            contentType.value = "text/css";
+        else
+            responseHeaders.push({
+                name: "content-type",
+                value: "text/json"
+            });
+    }
+
+    return {
+        responseHeaders
+    };
+}, { urls: ["*://*.discord.com/*"] }, ["blocking", "responseHeaders"]);

browser/manifest.json

@@ -22,7 +22,9 @@
         }
     ],
     "permissions": [
-        "*://*.discord.com/*"
+        "*://*.discord.com/*",
+        "webRequest",
+        "webRequestBlocking"
     ],
     "web_accessible_resources": [
         "dist/Vencord.js"