1234103 - Identity block performs extra twitching when I navigate from chrome page to web page

Status: RESOLVED INCOMPLETE

(Firefox :: Address Bar, defect)

Description

[arni2033]

Attachment: screencast 1 - Identity block performs extra twitching.webm

>>>   My Info:   Win7_64, Nightly 46, 32bit, ID 20151219030215
STR:
1.A) Open   about:home   in a new tab
1.B) Open private window
2.   Type   "example.org/" in urlbar without quotes, press Enter

Result (watch "screencast 1"):       
 Text in location bar quickly twitches to the right and back because
 "[branding_icon] Firefox" is displayed in identity block for about 0.1 second

Expectations: 
 Text should stay still during this operation

Notes (I believe this to be true):
 This happens because in both cases when I'm typing text in urlbar,   #urlbar   has
  [pageproxystate="invalid"], and   #identity-box   has [class="chromeUI"].
 So after I press Enter   #urlbar   gains [pageproxystate="valid"], then after a while (~0.1s)
  browser deletes removes text label and sets [class="unknownIdentity"] to   #identity-box

 I personally think that [pageproxystate] should change from "invalid" to "valid" in the last turn
 Probably this is e10s-related bug

Comment 1

[:Gijs (he/him)]

Can you still reproduce this on current Nightly?

Comment 2

[arni2033]

Yes. It seems that the time of twitching depends on how many times I opened a site in Step 2. When I
try STR with the same url 3 times or more, I never see twitching. But I mostly see it the 1st time.
I'll update this bug if I'll find a way to make result more noticeable/reproducible.

Comment 3

[arni2033]

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
I still see this happening, but it's not trivial to observe in most cases.
So I'll reopen this bug when I'll find a reliable way to observe/log it.