Closed Bug 1627006 Opened 4 years ago Closed 4 years ago

Mouse events are not properly triggered


(Core :: Panning and Zooming, defect, P3)




Tracking Status
firefox75 --- disabled
firefox76 --- disabled
firefox77 --- disabled
firefox78 --- fixed


(Reporter: mbalfanz, Unassigned)


(Blocks 1 open bug)


(Whiteboard: [apz:dtz:10:S])

When zoomed in, events like click and hover don't always work as expected.


  • set apz.allow_zoom to true
  • on any bugzilla page, zoom into a username on a comment
  • hover over the username and observe the link style

ER: The name should be underlined and the cursor should be a pointer
AR: The underline flashes (or just disappears) and the cursor returns to normal

Note that this behavior does not occur if you switch to a different tab and back after you zoomed


  • set apz.allow_zoom to true
  • visit
  • scroll the page until you see the "Subscriptions" links on the right-hand sidebar
  • zoom into the sidebar and hover the links

ER: when hovering links with a red-dotted underline, they should receive a red-dotted border. The cursor should be set to help
AR: links with red-dotted underline don't get hover styling, while other links do

Another thing I observed is that click events don't always work. It sometimes requires 2 clicks instead of one (as if the windows looses focus on zoom), though I don't have reliable STRs yet.

Hardware: MacBook Pro with Magic Trackpad

If you are setting apz.allow_zoom to true please say so explicitly in the STR for bugs you are filing.

At any rate bug 1556556 should help here.

Depends on: 1556556

Oups, sorry about that! I adjusted the STR

STR2 seems to be fixed for me by bug 1556556.

STR1 I could not reproduce in the first place. Martin, would you be able to give this another try with the latest nightly (which includes the fix for bug 1556556) and check if STR1 is resolved for you as well?

Flags: needinfo?(mbalfanz)

I can't reproduce STR1 anymore, so looks good to me 👍

Flags: needinfo?(mbalfanz)

Great, thanks for testing!

Closed: 4 years ago
Resolution: --- → DUPLICATE
Whiteboard: [apz:dtz:10:S]
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