Introduction
WebExtension API reference
Guides
VENDOR.md
package.json
innerHTML
span
Element.setHTML()
Changelog
The following WebExtension API changes were introduced in Thunderbird 115.8.0.
type MenuIconPath — The path for a menu icon may be a relative path to an icon file, a moz-extension: URL, an image data: URL, a blob: URL, or a remote http(s): URL.