Examine source code of Gab.com Share Extension

{
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "manifest_version": 2,
  "name": "Gab.com Share Extension",
  "short_name": "Share to Gab",
  "description": "An extension to easily send a post from any webpage to Gab.com.",
  "homepage_url": "https://share.gab.com/download",
  "version": "0.1.1resigned1",
  "icons": {
    "16": "assets/images/logo/gab-g-16.png",
    "48": "assets/images/logo/gab-g-48.png",
    "128": "assets/images/logo/gab-g-128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "menus",
    "notifications",
    "https://*.gab.com/*"
  ],
  "browser_action": {
    "default_icon": "assets/images/logo/gab-g-128.png",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://share.gab.com/*"
      ],
      "js": [
        "content/sharegab/script.js"
      ]
    }
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self' https://*.gab.com/*",
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+G",
        "mac": "Alt+Shift+G"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c1aa93a4-1612-4e55-808e-b1760984fc5a}"
    }
  }
}