Examine source code of YouTrack Tweaks

{
  "name": "YouTrack Tweaks",
  "description": "Add more functionality to YouTrack. Customize your agile board, hotkeys, and much more. All these features here, in YouTrack Tweaks.",
  "version": "0.0.0.37resigned1",
  "manifest_version": 2,
  "icons": {
    "128": "images/128.png",
    "256": "images/256.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "images/16.png",
      "32": "images/32.png"
    },
    "default_popup": "popup.html"
  },
  "permissions": [
    "*://*/*",
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "js": [
        "content_script.js"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "externally_connectable": {
    "matches": [
      "*://*.youtrack-tweaks.com/*"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ed06c32d-3ee9-48ab-8cf0-336f008aa74d}"
    }
  }
}