Examine source code of ASCIImoji-ff

{
  "description": "Asciify ALL the websites! (Firefox port)",
  "manifest_version": 2,
  "name": "ASCIImoji-ff",
  "icons": {
    "16": "images/icon-16.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.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": "{441c53e5-4e9c-4065-a288-32891c5c6d5b}",
      "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": "0.9.1"
}