Examine source code of Show Video Controls for Firefox

{
  "manifest_version": 2,
  "name": "Show Video Controls by Default for Firefox",
  "version": "4.1.0",
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "showvideocontrolsbydefault.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "description": "This extension automatically enables video controls when playing html <video></video> webm videos.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "showvidcontrolsbydefault@knighto.codeberg.org",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "id": "showvidcontrolsbydefault@knighto.codeberg.org",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "exclude_matches": [
        "*://*.youtube.com/*",
        "*://*.netflix.com/*",
        "*://*.vimeo.com/*",
        "*://*.dailymotion.com/*",
        "*://*.hulu.com/*",
        "*://*.twitch.tv/*",
        "*://youtube.com/*",
        "*://youtu.be/*",
        "*://netflix.com/*",
        "*://vimeo.com/*",
        "*://dailymotion.com/*",
        "*://hulu.com/*",
        "*://twitch.tv/*",
        "*://*.rumble.com/*",
        "*://*.facebook.com/*"
      ],
      "matches": [
        "<all_urls>",
        "*://*/*"
      ],
      "js": [
        "showvideocontrolsbydefault.js"
      ]
    }
  ]
}