Examine source code of Breakerblocks Sidebar

{
  "manifest_version": 2,
  "name": "Breakerblocks Sidebar",
  "version": "1.0",
  "description": "Open breakerblocks.com in a Firefox sidebar.",
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "backgroundWorker.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "Open Breaker Blocks"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c2445a53-8c56-47b5-8af6-9ed108b93012}"
    }
  }
}