Examine source code of LinkedIn Dark Themes

{
  "manifest_version": 2,
  "name": "LinkedIn Dark Themes",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "version": "1.2",
  "author": "Kairat Abylkasymov",
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.linkedin.com/*"
      ],
      "exclude_matches": [
        "*://www.linkedin.com/accessibility/*",
        "*://www.linkedin.com/help/*",
        "*://www.linkedin.com/legal/*",
        "*://www.linkedin.com/talent/*",
        "*://www.linkedin.com/uas/*",
        "*://www.linkedin.com/home/*",
        "*://www.linkedin.com/signup/*",
        "*://www.linkedin.com/login*",
        "*://www.linkedin.com/payments/*",
        "*://www.linkedin.com/psettings/*",
        "*://www.linkedin.com/premium/cancel/*",
        "*://www.linkedin.com/salary/*"
      ],
      "js": [
        "./content_scripts/index.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup/index.html"
  },
  "icons": {
    "48": "icons/linkedin_themes48.png",
    "96": "icons/linkedin_themes96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@linkedin-dark-themes.com"
    }
  }
}