Examine source code of Linkedin Text Highlight

{
  "name": "Linkedin Text Highlight",
  "description": "Help to Highlight Linkedin Share Box Text",
  "version": "1.0.0",
  "manifest_version": 2,
  "icons": {
    "16": "icon/16.png",
    "20": "icon/20.png",
    "24": "icon/24.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "64": "icon/64.png",
    "128": "icon/128.png"
  },
  "browser_action": {
    "default_title": "Highlight Text",
    "default_icon": {
      "16": "icon/16.png",
      "20": "icon/20.png",
      "24": "icon/24.png",
      "32": "icon/32.png",
      "48": "icon/48.png",
      "64": "icon/64.png",
      "128": "icon/128.png"
    }
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/*"
      ],
      "js": [
        "src/content.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e2526d2d-b87d-4e90-8b59-ff07763720a9}"
    }
  }
}