Examine source code of LinkfyGit

{
  "manifest_version": 2,
  "name": "LinkfyGit",
  "description": "Adds option to Context Menu (options which show after right click) for opening a page with git repo for selected ssh like address (eg. for git@gitlab.com:gitlab-org/gitlab.git will open https://gitlab.com/gitlab-org/gitlab).",
  "version": "1.0",
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "menus"
  ]
}