1240680 - Vimeo.com thumbnails flash black when mousing over them

Status: VERIFIED DUPLICATE of bug 1225934

(Core :: Layout, defect)

Description

[Chris Peterson [:cpeterson]]

STR:
1. Load https://vimeo.com/
2. Scroll down to the video thumbnails.
3. Quickly mouse over them.

RESULT:
The thumbnail images flash black or smaller images when the text overlays are loaded. Once a thumbnail image has flashed, it doesn't flash as much if you continue to mouse over it, as if the image has been cached.

This is a regression in FF 45, but I was not able to bisect to a narrower regression range.

Comment 1

[Chris Peterson [:cpeterson]]

[Tracking Requested - why for this release]:

This bug appears to be a layout regression in FF 45.

@ Alice, do you have time to try bisecting this regression? I tried twice, but I landed on two different pushlogs that didn't make sense (one in October 2015 and another in November 2015). I am running OS X 10.11, if it matters.

Comment 2

[Alice0775 White]

Seems it works as expected on 46.0a1 & 45.0a2 windows7 with/without HWA.

Comment 3

[Chris Peterson [:cpeterson]]

I can reproduce the problem with FF 46 on Windows 10 (in a VM).

Comment 4

[Chris Peterson [:cpeterson]]

@ Seth, I believe this vimeo.com bug is a regression in FF 44 from your size prediction bug 1207355. This might be a duplicate of bug 1225934 or bug 1235093.

I bisected this regression to this pushlog:

https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=99a4fb4ba5c1ee96ac745c6ad11894bf0537f73a&tochange=2e19045ba652ca2a5a5fc0e20d6f95293acfa32d

Comment 5

[Liz Henry (:lizzard) (relman/hg->git project)]

Tracking for 45+ as this is a recent regression.

Comment 6

[Seth Fowler [:seth] [:s2h]]

Suspected dupe of bug 1225934; will verify.

Comment 7

[Seth Fowler [:seth] [:s2h]]

(In reply to Seth Fowler [:seth] [:s2h] from comment #6)
> Suspected dupe of bug 1225934; will verify.

I can't reproduce on OS X, so I've been able to establish either way whether this should be duped. Chris, can you still reproduce on current Nightly on OS X? If not, what platform are you reproducing on?

Needinfo me when you reply as I'd like to prioritize fixing this.

Comment 8

[Chris Peterson [:cpeterson]]

I can still reproduce this problem on OS X 10.11 on my MacBook Pro. I am pretty sure this is a duplicate of bug 1225934.

Here is revised STR:

1. Load https://vimeo.com/
2. Scroll down to the video thumbnails in "Watch the world’s best videos from our passionate community"  section (in the middle of the page), *not* the "Purchase films and series and support creators" section at the bottom of the page.
3. *Slowly* mouse over them.

RESULT:
The thumbnail images flash black or a smaller version of image will expand from the upper-left corner of the thumbnail box. Once a image has flashed, it won't flash again if you continue to mouse over it.

Comment 9

[Sylvestre Ledru [:Sylvestre]]

Jet, do you know who else could help with this issue? It would be great to fix it for 46? Thanks

Comment 10

[Jet Villegas (inactive)]

Appears to be fixed in bug 1225934. We'll request an uplift from that bug.

Comment 11

[Chris Peterson [:cpeterson]]

Verified fixed in Nightly 48 but still broken in Aurora 46 and Beta 45. :(

Comment 13

[Liz Henry (:lizzard) (relman/hg->git project)]

Seth, can you follow up to figure out what we might try to uplift to get this fix in 46?

Comment 14

[Liz Henry (:lizzard) (relman/hg->git project)]

Actually, never mind, we uplifted the fix in bug 1225934 today. So we can mark this fixed in 46 now.  
After we release beta 4 we should verify the fix.   Chris you can probably verify on aurora with tomorrow's build if you have time!

Comment 15

[Seth Fowler [:seth] [:s2h]]

Just needinfo'ing Chris to make sure this gets verified. I was never able to reproduce this one.

Comment 16

[Chris Peterson [:cpeterson]]

Verified fixed in Aurora 47.