Examine source code of File Centipede

{
  "manifest_version": 2,
  "name": "__MSG_appname__",
  "version": "2.99.6",
  "description": "Download files, videos, audio, and images from web pages.",
  "homepage_url": "http://www.filecxx.com",
  "default_locale": "en",
  "icons": {
    "128": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "config.js",
      "libs/base64.js",
      "libs/functions.js",
      "background/mimes.js",
      "background/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "config.js",
        "libs/base64.js",
        "libs/functions.js",
        "libs/trashscript.js",
        "libs/trashscript_lib.js",
        "libs/trashscript_ext.js",
        "background/mimes.js",
        "parser/parser_m3u8.js",
        "parser/parser_quality.js",
        "content/content_element_selector.js",
        "content/content_wrapper.js",
        "content/content_ui.js",
        "content/content_location.js",
        "content/content_magnets.js",
        "content/content_others.js",
        "content/content_extract.js",
        "content/content_medias.js",
        "content/content_collector.js",
        "content/content_resources.js",
        "content/content_video_bar.js",
        "content/content_video_bar_item.js",
        "content/content_download_list.js",
        "content/content_rules.js",
        "content/content_third_party_interfaces.js",
        "content/content_third_party_window.js",
        "content/content_xdialog.js",
        "content/content_codeview.js",
        "content/content.js"
      ],
      "match_about_blank": true,
      "matches": [
        "http://*/*",
        "https://*/*",
        "ftp://*/*",
        "file:///*"
      ],
      "run_at": "document_start",
      "css": [
        "default.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "config.js",
    "icons/*",
    "content/*",
    "icons/*",
    "libs/*",
    "libs/*/*"
  ],
  "permissions": [
    "<all_urls>",
    "tabs",
    "activeTab",
    "cookies",
    "contextMenus",
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "storage",
    "downloads",
    "declarativeNetRequest",
    "*://*/*",
    "http://*/*",
    "https://*/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src 'self' http://* https://* data: blob:;",
  "browser_specific_settings": {
    "gecko": {
      "id": "{01de531b-ca21-4597-b352-18d787f00cac}"
    }
  }
}