common/extensions/webextensions-selenium-example-signed/manifest.json

{
  "manifest_version": 3,
  "name": "webextensions-selenium-example",
  "description": "Inject a div with id webextensions-selenium-example to verify that WebExtensions work in Firefox/Selenium",
  "version": "0.1",
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "inject.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "webextensions-selenium-example-v3@example.com"
    }
  }
}