Examine source code of Harvest Time Tracker

{
  "version": "3.1.24",
  "name": "Harvest Time Tracker",
  "description": "Track time from Edge, Firefox and within popular project management tools.",
  "author": "Iridesco, LLC d/b/a Harvest",
  "manifest_version": 2,
  "icons": {
    "16": "images/h-app@16px.png",
    "48": "images/h-app@48px.png",
    "128": "images/h-app@128px.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "images/h-toolbar-off@19px.png",
      "38": "images/h-toolbar-off@38px.png"
    },
    "default_title": "Start a Harvest timer",
    "default_popup": "popup.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+H"
      }
    }
  },
  "background": {
    "scripts": [
      "js/config.js",
      "js/background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "support@harvestapp.com"
    }
  },
  "content_security_policy": "script-src 'self' https://*.harvestapp.com https://*.harvestapp.test; object-src 'self'",
  "permissions": [
    "https://github.com/*",
    "webRequest",
    "webRequestBlocking"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://basecamp.com/*"
      ],
      "js": [
        "js/profiles/basecamp2.js"
      ]
    },
    {
      "matches": [
        "https://3.basecamp.com/*"
      ],
      "js": [
        "js/profiles/basecamp3.js"
      ],
      "css": [
        "css/basecamp3.css"
      ]
    },
    {
      "matches": [
        "https://app.basecamp.com/*"
      ],
      "js": [
        "js/profiles/basecamp5.js"
      ],
      "css": [
        "css/basecamp5.css"
      ]
    },
    {
      "matches": [
        "https://trello.com/*"
      ],
      "js": [
        "js/profiles/trello.js"
      ],
      "css": [
        "css/trello.css"
      ]
    },
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "js/profiles/github.js"
      ],
      "css": [
        "css/github.css"
      ]
    },
    {
      "matches": [
        "https://app.asana.com/*"
      ],
      "js": [
        "js/profiles/asana.js"
      ],
      "css": [
        "css/asana.css"
      ]
    },
    {
      "matches": [
        "https://linear.app/*"
      ],
      "js": [
        "js/profiles/linear.js"
      ],
      "css": [
        "css/linear.css"
      ]
    },
    {
      "matches": [
        "https://*.notion.so/*"
      ],
      "js": [
        "js/profiles/notion.js"
      ],
      "css": [
        "css/notion.css"
      ]
    },
    {
      "matches": [
        "https://*.monday.com/*"
      ],
      "js": [
        "js/profiles/monday.js"
      ],
      "css": [
        "css/monday.css"
      ]
    }
  ]
}