Examine source code of Branch Namer

{
  "manifest_version": 2,
  "name": "Branch Namer",
  "description": "Copies selected text and formats it to a valid Git branch name for feature or bugfix branches.",
  "version": "1.2",
  "author": "Vitec Capitex Financial Systems",
  "browser_action": {
    "default_popup": "src/popup.html"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "src/context_menu.js"
    ]
  },
  "icons": {
    "16": "images/branch_namer_icon-16.png",
    "48": "images/branch_namer_icon-48.png",
    "128": "images/branch_namer_icon-128.png"
  }
}