Examine source code of Backit plugin

{
  "manifest_version": 2,
  "name": "Backit Plugin",
  "description": "__MSG_extDescription__",
  "default_locale": "en",
  "version": "2.6.2",
  "author": "Backit Development Team",
  "homepage_url": "https://backit.me",
  "minimum_chrome_version": "70",
  "incognito": "not_allowed",
  "icons": {
    "16": "icons/logo-16.png",
    "32": "icons/logo-32.png",
    "42": "icons/logo-42.png",
    "48": "icons/logo-48.png",
    "70": "icons/logo-70.png",
    "120": "icons/logo-120.png",
    "128": "icons/logo-128.png"
  },
  "permissions": [
    "proxy",
    "management",
    "notifications",
    "cookies",
    "tabs",
    "storage",
    "webNavigation",
    "http://*.backit.me/*",
    "https://*.backit.me/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "./cs_index.js",
        "./cs_search_integration.js"
      ],
      "css": [
        "./cs_index.css",
        "assets/contentScriptsStyle/searchIntegration.css"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "browser_action": {
    "default_title": "Backit Plugin",
    "default_popup": "popup/popup.html",
    "default_icon": "icons/logo-48.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Z",
        "mac": "MacCtrl+Shift+Z"
      }
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "chrome_style": true
  },
  "web_accessible_resources": [
    "/assets/appIcons/cog-solid.svg",
    "/assets/appIcons/times-circle-light.svg",
    "/assets/appIcons/angle-up-light.svg",
    "/assets/backit/main-logo.svg",
    "/assets/tapicash/main-logo.svg"
  ],
  "applications": {
    "gecko": {
      "id": "jid1-XAZYVkS6OPAR5Q@jetpack",
      "strict_min_version": "51.0"
    }
  }
}