Cristian Fogel [:cfogel] Reporter
	Description • 6 years ago

[Affected versions]:
- 60, 61.0b10, 62.0a1 (2018-06-12)

[Affected platforms]:
- Win 10x64;

[Steps to reproduce]:
1. Launch Firefox;
2. Click on the browser's restore down button(so it's not on full-screen);
3. Click on the Hamburger menu button;
4. Grab and move the browser quickly  to another location on the screen.

[Expected result]:
- The dropdown menu moves with the parent button.

[Actual result]:
- The dropdown is is stuck in place.

[Regression range]:
- was able to reproduce on v45.

[Additional notes]:
- attached screenshot with the issue;
- the fade-out part is as expected;
- reproducible for any other button/dropdown as well;
- not reproducible on MacOS(10.13.4) and Ubuntu(16.04LTS).

	Cristian Fogel [:cfogel] Reporter
	Comment 1 • 6 years ago

Correction on platform and summary.

	Cristian Fogel [:cfogel] Reporter
	Comment 2 • 6 years ago

Reproducible on Win 7(x86) as well.

	Jared Wein [:jaws] (please needinfo? me)
	Comment 3 • 6 years ago

This appears to affect all popups and is not a common use case among users. As well, there is no data loss and it is easy to re-open the menu.

This happens because dragging the window removes focus from the menu and the menu closes on blur.

	Cristian Fogel [:cfogel] Reporter
	Comment 4 • 6 years ago

I'm well aware that this is an edge case, but it does not happen on other browsers (ex: on Chrome/IE the drop-down is closed before dragging the window around). Wouldn't it be safer to reopen this and set it to the lowest priority, so we can keep track of it?

	Jared Wein [:jaws] (please needinfo? me)
	Comment 5 • 6 years ago

I'm actually unable to reproduce this again with Firefox Nightly 63.0a1 (2018-07-09) (64-bit) on Windows. I should have marked this as WONTFIX instead of INVALID, but now that I see it has been potentially fixed I'm changing the resolution to WORKSFORME.