Examine source code of HourStack

{
  "manifest_version": 2,
  "name": "HourStack",
  "description": "Time Tracking for Tasks",
  "permissions": [
    "activeTab",
    "alarms",
    "contextMenus",
    "storage",
    "https://app.hourstack.com/*"
  ],
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icon-16.png",
      "19": "assets/icon-19.png",
      "32": "assets/icon-32.png",
      "38": "assets/icon-38.png"
    },
    "default_title": "HourStack",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "newtab/newtab.html"
  },
  "web_accessible_resources": [
    "proxy/*",
    "assets/*.svg"
  ],
  "version": "1.1.5",
  "content_scripts": [
    {
      "matches": [
        "*://app.asana.com/*"
      ],
      "js": [
        "content/integrations/asana.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.basecamp.com/*"
      ],
      "js": [
        "content/integrations/basecamp.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://bitbucket.org/*"
      ],
      "js": [
        "content/integrations/bitbucket.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://app.clickup.com/*"
      ],
      "js": [
        "content/integrations/clickup.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://calendar.google.com/*"
      ],
      "js": [
        "content/integrations/google-calendar.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://app.hubspot.com/*"
      ],
      "js": [
        "content/integrations/hubspot.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://github.com/*"
      ],
      "js": [
        "content/integrations/github.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.monday.com/*"
      ],
      "js": [
        "content/integrations/monday.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://www.notion.so/*"
      ],
      "js": [
        "content/integrations/notion.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://outlook.live.com/*"
      ],
      "js": [
        "content/integrations/outlook-calendar.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://todoist.com/*"
      ],
      "js": [
        "content/integrations/todoist.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://trello.com/*"
      ],
      "js": [
        "content/integrations/trello.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://www.wrike.com/*"
      ],
      "js": [
        "content/integrations/wrike.js"
      ],
      "css": [
        "content/styles/integration-button.css",
        "content/styles/create-entry.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://app.hourstack.com/*"
      ],
      "js": [
        "content/hourstack.js"
      ],
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{322adb9e-8fac-480b-828a-83fd02e622e1}"
    }
  }
}