menus.ACTION_MENU_TOP_LEVEL_LIMIT

The maximum number of top level extension items that can be added to a menu item whose ContextType is "browser_action" or "page_action". Any items beyond this limit will be ignored.

Its value is 6 on Firefox and Chrome.

For compatibility with other browsers, Firefox makes this property available via the contextMenus namespace as well as the menus namespace.

Browser compatibility

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webextensions-desktopwebextensions-mobile
ChromeEdgeFirefoxOperaSafariFirefox for Android
ACTION_MENU_TOP_LEVEL_LIMIT

Legend

Full support
Full support
No support
No support
Uses a non-standard name.

Acknowledgements

This API is based on Chromium's chrome.contextMenus API. This documentation is derived from context_menus.json in the Chromium code.