Try in Dev Spaces

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "Adds a button to GitHub that opens projects on Dev Spaces instances.",
  "version": "1.1.1",
  "manifest_version": 3,
  "name": "Try in Dev Spaces",
  "optional_host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "host_permissions": [
    "https://github.com/*"
  ],
  "background": {
    "service_worker": "backgroundScript.bundle.js"
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}