Examine source code of Hide Fu Comments

{
  "description": "Hides unwanted/annoying comments from news portals",
  "manifest_version": 2,
  "name": "Hide Fu Comments",
  "version": "0.1",
  "homepage_url": "https://github.com/justasmalinauskas/fu-comments",
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "https://*.delfi.lt/*",
    "webRequest",
    "webRequestBlocking",
    "storage"
  ],
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{95949a0d-6b78-4c3a-8462-2ca9e8978c2a}"
    }
  }
}