Examine source code of bugzilla-to-webcompat

{
  "description": "Adding a button to bugzilla ui allowing to move a bug to webcompat.com",
  "manifest_version": 2,
  "name": "bugzilla-to-webcompat",
  "version": "1.1",
  "homepage_url": "https://github.com/webcompat/bugzilla-to-webcompat",
  "icons": {},
  "permissions": [
    "tabs",
    "activeTab",
    "https://bugzilla.mozilla.org/show_bug.cgi?id=*",
    "https://bugzilla.allizom.org/show_bug.cgi?id=*",
    "https://staging.webcompat.com/*",
    "https://webcompat.com/*",
    "https://product-details.mozilla.org/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://bugzilla.mozilla.org/show_bug.cgi?id=*",
        "https://bugzilla.allizom.org/show_bug.cgi?id=*"
      ],
      "js": [
        "module_shim.js",
        "utils.js",
        "moveToWebcompat.js"
      ],
      "css": [
        "moveToWebcompat.css"
      ]
    }
  ]
}