Examine source code of Salesbook Filter

{
  "description": "This extension let you delete facebook sales posts that do not fit in the specified price range and thus make your researches faster.",
  "manifest_version": 2,
  "name": "Salesbook Filter",
  "version": "1.0.2resigned1",
  "homepage_url": "https://github.com/vladmourier/salesbook-filter",
  "icons": {
    "48": "icons/icon48.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": "icons/icon32.png",
    "default_title": "Salesbook Filter",
    "default_popup": "popup/salesbook_popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e3e04ed0-db20-4e64-85d5-d5da3fd62953}"
    }
  }
}