Examine source code of GitHub Commit Message Helper

{
  "manifest_version" : 2 ,
  "name" : "GitHub Commit Message Helper",
  "version" : "1.2.0",
  "description" : "Enforces good git commit message discipline in GitHub PR merge dialogs: monospace font, line-length indicators, and text reflow.",
  "permissions" : [
    "storage" 
  ],
  "browser_action" : {
    "default_icon" : "icons/icon-48.svg",
    "default_popup" : "src/popup.html",
    "default_title" : "Commit Message Helper Settings"
  },
  "content_scripts" : [
    {
      "matches" : [
        "https://github.com/*" 
      ],
      "js" : [
        "src/text-processing.js" ,
        "src/content.js" 
      ],
      "css" : [
        "src/content.css" 
      ],
      "run_at" : "document_idle" 
    }
  ],
  "icons" : {
    "48" : "icons/icon-48.svg",
    "96" : "icons/icon-96.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{996c52ec-dd0a-4d25-9c1d-5c724c61c400}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}