Made a separate manifest file for Firefox

firefox_manifest.json

@@ -0,0 +1,60 @@
+{
+  "name": "YTSponsorSkip",
+  "version": "1.0",
+  "description": "Skip youtube video sponsors.",
+  "content_scripts": [
+    {
+      "matches": [
+        "https://*.youtube.com/*"
+      ],
+      "js": [
+        "config.js",
+        "content.js"
+      ],
+      "css": [
+        "content.css",
+        "./libs/Source+Sans+Pro.css"
+      ]
+    }
+  ],
+  "web_accessible_resources": [
+    "icons/LogoSponsorBlocker256px.png",
+    "icons/IconSponsorBlocker256px.png",
+    "icons/PlayerStartIconSponsorBlocker256px.png",
+    "icons/PlayerStopIconSponsorBlocker256px.png",
+    "icons/PlayerUploadIconSponsorBlocker256px.png",
+    "icons/PlayerUploadFailedIconSponsorBlocker256px.png",
+    "icons/upvote.png",
+    "icons/downvote.png"
+  ],
+  "permissions": [
+    "tabs",
+    "storage",
+    "notifications",
+    "https://sponsor.ajay.app/*"
+  ],
+  "browser_action": {
+    "default_title": "SponsorBlock",
+    "default_popup": "popup.html"
+  }, 
+  "background": {
+    "scripts":[
+      "config.js",
+      "background.js"
+    ]
+  },
+  "icons": {
+    "16": "icons/IconSponsorBlocker16px.png",
+    "32": "icons/IconSponsorBlocker32px.png",
+    "64": "icons/LogoSponsorBlocker64px.png",
+    "128": "icons/LogoSponsorBlocker128px.png",
+    "256": "icons/LogoSponsorBlocker256px.png"
+  },
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "sponsorBlocker@ajay.app",
+      "strict_min_version": "42.0"
+    }
+  },
+  "manifest_version": 2
+}

manifest.json

@@ -50,11 +50,5 @@
     "128": "icons/LogoSponsorBlocker128px.png",
     "256": "icons/LogoSponsorBlocker256px.png"
   },
-  "browser_specific_settings": {
-    "gecko": {
-      "id": "sponsorBlocker@ajay.app",
-      "strict_min_version": "42.0"
-    }
-  },
   "manifest_version": 2
 }