1397283 - The page action icons flicker when going back from preferences to new tab

Status: RESOLVED WORKSFORME

(Firefox :: Address Bar, defect, P5)

Description

[Florian Quèze [:florian]]

Attachment: Screen recording

Steps to reproduce:
1. Open a new tab (but the home page also works)
2. Load about:preferences
3. Click the back button

Expected result: no flicker.

Actual result:
- at some point, the "Nightly" block in the identity area disappears, and the page action icons appear at the end of the urlbar. The 'about:preferences' url remains displayed.
- a few frames later the URL bar is cleared (both the url and the page action icons disappear).

As a random guess, I would say this could be related to switching between a no-remote browser for preferences to a remote one for about:newtab.

See attached screen recording.

Comment 1

[:Gijs (he/him)]

(In reply to Florian Quèze [:florian] (unavailable for Firefox until June 4th) from comment #0)
> As a random guess, I would say this could be related to switching between a
> no-remote browser for preferences to a remote one for about:newtab.

I think this is correct, and as a result this won't hit users very often, so I'd make this p5... except that I'm confused because the URL is updated to about:preferences, and the identity block goes away - but the page action menu doesn't. I don't really understand why that inconsistency happens, unless that's a perf fix for the more usual case where we navigate between 2 remote pages, or something. Anyway, fxperf:p3 it is to balance the p5-ness and the priority of figuring out what's going on here...

Comment 2

[Florencia Di Ciocco, NI to vbalducci]

Hi, I'm closing this bug as WFM since I can't reproduce the behavior. If I'm wrong, please do reopen it.