Examine source code of BOE Style Format

{
  "description": "Adds new styles to BOE pages.",
  "manifest_version": 2,
  "name": "BOE Style Format",
  "version": "1.0.1",
  "icons": {
    "48": "icons/BOE_logo.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_icon": "icons/BOE_logo_off.svg",
    "browser_style": true
  },
  "permissions": [
    "activeTab",
    "tabs"
  ]
}