manifest.json

{
   "description": "Asciify ALL the websites! (Firefox port)",
   "manifest_version": 2,
   "name": "ASCIImoji",
   "icons": {
      "128": "images/icon-128.png",
      "16": "images/icon-16.png",
      "48": "images/icon-48.png"
   },
   "background": {
      "scripts": [
         "js/jquery-3.4.1.min.js",
         "js/asciimoji.js",
         "js/background.js"
      ]
   },
   "content_scripts": [
      {
         "all_frames": true,
         "js": [
            "js/jquery-3.4.1.min.js",
            "js/asciimoji.js",
            "js/asciimoji.jquery.js",
            "js/script.js"
         ],
         "matches": [
            "<all_urls>"
         ]
      }
   ],
   "browser_specific_settings": {
      "gecko": {
         "id": "addon@example.com",
         "strict_min_version": "70.0"
      }
   },
   "options_ui": {
      "page": "options/index.html",
      "browser_style": true,
      "open_in_tab":true
    },
   "permissions": [
      "storage",
      "tabs",
      "http://*/*",
      "https://*/*",
      "contextMenus"
   ],
   "version": "ff2.0.0"
}