Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: firefox (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/2006468

Title:
  firefox does not detect mousemove events

Status in firefox package in Ubuntu:
  Confirmed

Bug description:
  I have an issue, which I saw only on Firefox : after some time (or
  some event which I haven't identified yet), Firefox does not react to
  my mouse movement events

  meaning :

    * when hovering over an HTML item, it does not highlight/change appearance 
even if it is supposed to do so,
    * when hovering over a clickable item, the cursor does not change,
    * when hovering over selectable text, the cursor does not change,
    * tooltips do not appear,
    * etc ...

  if I trigger other GUI events (if I *click*, or if I *press any
  keyboard key* -- `[A]`, `[Shift]`, `[Ctrl]` ...), then the GUI reacts
  (cursor changes, tooltips appear, animations get triggered ...), a bit
  as if, by handling that other event, firefox realized "oh, the cursor
  is actually there", but with no external event, my
  mousenter/mouseleave events seem to be ignored, or stalled.

  Running Ubuntu 22.10 (kinetic), and regular firefox snap install (my
  current version: 109.0.1-1).

  As said in the previous sentence: firefox is installed through snap
  (which, if I am correct, is the default way to install firefox on a
  Ubuntu system these days) not through an apt package.

  Is this a known issue ?

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