Examine source code of Fennec Copy Link Text

{
  "name": "Fennec Copy Link Text",
  "description": "This addon adds a menu item to the context menu, and it lets you easily copy the visible text of the selected link.",
  "manifest_version": 2,
  "version": "2.5.1resigned1",
  "homepage_url": "https://github.com/shyangs/Fennec-Copy-Link-Text",
  "applications": {
    "gecko": {
      "id": "FennecCopyLinkText@shyangs",
      "strict_min_version": "57.0"
    }
  },
  "developer": {
    "name": "shyangs",
    "url": "https://github.com/shyangs"
  },
  "permissions": [],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>",
        "file:///*"
      ],
      "js": [
        "content_scripts/lightbox.js",
        "content_scripts/content.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ]
}