Examine source code of Project Environment Switcher

{
  "manifest_version": 2,
  "name": "Environment Switcher",
  "description": "Switch between different environments and languages with ease",
  "version": "1.0.17",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "64": "icon64.png",
    "128": "icon128.png",
    "512": "icon512.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "http://*/*",
    "https://*/*"
  ],
  "optional_permissions": [
    "history"
  ],
  "omnibox": {
    "keyword": "env"
  },
  "commands": {
    "quick_switch": {
      "suggested_key": {
        "default": "Alt+Shift+E",
        "mac": "Alt+Shift+E"
      },
      "description": "Open in-page quick switcher"
    },
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+E",
        "mac": "Command+E"
      },
      "description": "Open Environment Switcher popup"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Env Switcher",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "env-switcher@example.com",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}