1175884 - Firefox addon element abnormally flashing using CSS animation on Mac

Status: RESOLVED INVALID

(Firefox :: Extension Compatibility, defect)

Description

[noitidart]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0
Build ID: 20150611135623

Steps to reproduce:

The problem only happens on Mac:

This is written by user James_ from Stackoverflow: http://stackoverflow.com/questions/29972371/firefox-addon-element-abnormally-flashing-using-css-animation-on-mac 
 filed this because I have encountered the same behavior.

The 'Test Link' element flashes abnormally when used in a Firefox addon panel (sdk/panel) when compared to the [JSFiddle demo](https://jsfiddle.net/sozvga4g/1/) despite they share the same source code.

Firefox addon source code: https://drive.google.com/file/d/0BzHBWuszZv5_eWl1RTdIOW84NG8/view?usp=sharing

to run

download and unzip
```
$ cd CSSFlashing3; cfx run
```

Is there any workaround to the problem because who knows how long does it take for Mozilla to fix this?

Comment 1

[noitidart]

His test case runs in HTML, I have not encountered flashing there, however I have inserted some elements to to the australis main menu (tri-stipe menu) and it happens to me in the XUL.

Comment 2

[noitidart]

Here is a screencast of my situation: https://www.youtube.com/watch?v=IEeGAjhhntw

We see a flash sometimes and sometimes that causes the mouseleave even to trigger, which causes my expanded menu to collapse. :(

Comment 3

[u554753]

Hi noitdart, 

Are you still encountering these issues on the newest version of Firefox (42)?

Comment 4

[noitidart]

(In reply to Grover Wimberly IV from comment #3)
> Hi noitdart, 
> 
> Are you still encountering these issues on the newest version of Firefox
> (42)?

I'll test it out and get back to you

Comment 5

[noitidart]

(In reply to Grover Wimberly IV from comment #3)
> Hi noitdart, 
> 
> Are you still encountering these issues on the newest version of Firefox
> (42)?

Just tested it, yes I am seeing the flashing :( And the flash causes the mouse off event to happen which closes the menu :(

Comment 6

[noitidart]

(In reply to Grover Wimberly IV from comment #3)
> Hi noitdart, 
> 
> Are you still encountering these issues on the newest version of Firefox
> (42)?

Here is a youtube screencast I recorded showing the animation flicker, and its side effect of triggering mouseleave event - https://www.youtube.com/watch?v=4WBWctui0fs

Comment 7

[Andy McKay]

With WebExtensions being the only valid way of doing extensions in Firefox 57, I don't think this bug is still relevant.