Examine source code of Interesting History

{
  "author": "j4vi.com",
  "description": "A different way to view your browser history to highlight interesting links",
  "name": "Interesting History",
  "version": "2.2.0",
  "icons": {
    "16": "icons/16.png",
    "19": "icons/19.png",
    "32": "icons/32.png",
    "38": "icons/38.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "96": "icons/96.png",
    "128": "icons/128.png",
    "256": "icons/256.png",
    "512": "icons/512.png"
  },
  "options_ui": {
    "page": "src/entries/options/index.html",
    "open_in_tab": true,
    "chrome_style": false
  },
  "chrome_url_overrides": {
    "newtab": "src/entries/page/index.html"
  },
  "permissions": [
    "history"
  ],
  "background": {
    "persistent": true,
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "19": "icons/19.png",
      "32": "icons/32.png",
      "38": "icons/38.png"
    }
  },
  "manifest_version": 2,
  "web_accessible_resources": [
    "assets/Tips-BD9TK9eu.js",
    "assets/_commonjsHelpers-Cpj98o6Y.js",
    "assets/browser-polyfill-CZ-T0TRz.js",
    "assets/main-BXAp3gTS.css",
    "assets/src/entries/page/main-DVSFs3pL.js",
    "src/entries/page/index.html",
    "src/entries/page/main.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fc75540d-02dc-4741-aa29-b6fcd360b3e2}"
    }
  }
}