Examine source code of Links for later

{
  "manifest_version": 2,
  "name": "Links for later",
  "version": "1.9.0",
  "description": "Save links that you want to look at for later.",
  "author": "LoveIsGrief",
  "applications": {
    "gecko": {
      "id": "@links-for-later"
    }
  },
  "icons": {
    "64": "data/icon-64.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "data/icon-64.png",
    "default_popup": "popup/panel.html",
    "default_title": "Save link for later"
  },
  "background": {
    "page": "index.html"
  },
  "options_ui": {
    "page": "options/index.html",
    "browser_style": true
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self';",
  "permissions": [
    "<all_urls>",
    "activeTab",
    "contextualIdentities",
    "contextMenus",
    "cookies",
    "notifications",
    "storage",
    "tabs"
  ]
}