Examine source code of Reddit Ad Remover

{
  "manifest_version": 2,
  "name": "Reddit Ad Remover",
  "version": "1.1.7",
  "description": "Removes Reddit 'promoted' posts and advertisements in the feed, sidebar and comment section",
  "icons": {
    "48": "icons/RAR_icon_v1_48.png"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "storage",
    "*://*.reddit.com/*",
    "contextMenus"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "48": "icons/RAR_icon_v1_48.png",
      "96": "icons/RAR_icon_v1_96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "js": [
        "removeads.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f957b9dd-119f-432f-becf-49deef9c3ca9}"
    }
  }
}