Examine source code of VV Feed Eradicator

{
  "name": "VV Feed",
  "version": "3.0.1",
  "description": "Eradicate social media noise by replacing your entire news feed with a visual from Visualize Value",
  "manifest_version": 2,
  "permissions": [
    "storage"
  ],
  "optional_permissions": [
    "http://www.facebook.com/*",
    "https://www.facebook.com/*",
    "http://web.facebook.com/*",
    "https://web.facebook.com/*",
    "http://twitter.com/*",
    "https://twitter.com/*",
    "https://www.reddit.com/",
    "http://www.reddit.com/",
    "https://old.reddit.com/",
    "http://old.reddit.com/",
    "https://news.ycombinator.com/*",
    "http://www.linkedin.com/*",
    "https://www.linkedin.com/*",
    "https://www.youtube.com/*",
    "https://www.github.com/*",
    "https://github.com/*",
    "http://www.instagram.com/*",
    "https://www.instagram.com/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "64": "icon64.png",
      "128": "icon128.png"
    },
    "default_title": "News Feed Eradicator"
  },
  "background": {
    "page": "background.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true,
    "browser_style": false,
    "chrome_style": false
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@vv-feed"
    }
  }
}