In Firefox / Thunderbird 136, inline event handlers will be deprecated - they will simply not be executed anymore.
therefore any event handlers that added via event attributes (either with a xul overlay or a function injecting the attribute) have to be replaced with a real JavaScript coded event.
In Firefox / Thunderbird 136, inline event handlers will be deprecated - they will simply not be executed anymore.
therefore any event handlers that added via event attributes (either with a xul overlay or a function injecting the attribute) have to be replaced with a real JavaScript coded event.