Examine source code of brb

{
  "manifest_version": 2,
  "name": "tab-saver",
  "version": "1.0",
  "description": "Adds a button to the toolbar. Click the button to save all your tabs before exiting. Click again to restore all of them.",
  "homepage_url": "https://github.com/ratherlongname/tab-saver.git",
  "icons": {
    "48": "icons/beasts-48.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/beasts-32.png",
    "default_title": "Tab Saver"
  },
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tabsaver@tabsaver.com"
    }
  }
}