Click event triggering when using non-primary button

[hawkeye116477]

Hello. Looks like I noticed weird behaviour, which happens on extensions, for example at uBlock Origin. If you click using other than primary button, then it works as double function, so for example if I right click, then I see context menu and also can click to change uBO's tab. This doesn't happen with websites. I don't know if that's intended, but seems like same symptoms as in viewtopic.php?t=30469.

Browser: Pale Moon 33.8.2

Update: I digged and looks like last working good was 33.2.1, so something at 33.3.0 was changed.

[Moonchild]

This would be because of Issue #2515 (UXP).
Chrome clicks are handled differently than content, and explicitly handle non-primary button clicks within events. This is intended behaviour, and extensions need to check for non-primary as well if they do not want to have non-primary events handled, similar to what we've done with devtools to adjust for this behaviour, .