1445562 - Tabs are loaded but not rendered when restored from last session

Status: RESOLVED INCOMPLETE

(Firefox :: Untriaged, defect)

Description

[Ishan Jain]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0
Build ID: 20180207210535

Steps to reproduce:

I have 2 windows open, Each with 50+ tabs. I shutdown my PC without closing firefox and holding the power button and then restart the PC.

Then I open firefox, Both windows from last session are restored.

I am using Arch linux x64/i3. 
Firefox version 58.0.2

Hardware Configuration:
i7 4710HQ
8 GB DDR3
1 TB 5400 RPM drive
GTX 960M


Actual results:

Tabs in one window work fine, I can open new tabs in that window, View old tabs etc. everything is Fine!. 

But In other Window, When I refresh any tab, It loads resources from network but nothing is rendered! Like every single tab shows me a blank page! If I open a new tab in this window, It wouldn't render anything at all!



Expected results:

Both windows should've loaded all old tabs and rendered content correctly but one of the windows has this faulty behaviour. 

I tried restarting a couple of times and everytime, The window that'll go haywire is random. So, Sometimes the first window goes haywire sometimes it's the second window that goes haywire.

Comment 1

[Ishan Jain]

Update: When Firefox is restarted, The active tab in faulty window is rendered just fine, But all other tabs and any new tabs in that window are not rendered. 

Closing the faulty window and then restoring it from Menu->History->Last closed windows does not fixes anything.

Comment 2

[Cosmin Muntean [:cmuntean], Ecosystem QA]

User Agent  Mozilla/5.0 (X11; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0
Firefox: 59.0.1, Build ID: 20180315233128

I have tested this issue on latest Firefox (59.0.1) release and latest Nightly (61.0a1) build on Arch linux but I haven't managed to reproduce it. I have opened two Firefox windows with 50+ tabs opened on each and turn off the computer using the power button. But, after I opened Firefox both windows were correctly restored and the tabs was correctly loaded when I navigated through them on each window.

@ishanjain28 do you have any custom setting regarding session restore?
Also can you please retest this issue on latest Firefox 59.0.1 using a new Firefox profile (https://goo.gl/RAHnUd), maybe even on safe mode (https://goo.gl/AR5o9d), to eliminate custom settings as a possible cause?

Comment 3

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Marking this as Resolved - Incomplete due to the lack of response from the reporter.
If anyone can still reproduce it on the latest versions, feel free to reopen the issue and provide more information.

Comment 4

[Ishan Jain]

(In reply to Cosmin Muntean [:CosminMCG], Desktop Engineering QA from comment #3)
> Marking this as Resolved - Incomplete due to the lack of response from the
> reporter.
> If anyone can still reproduce it on the latest versions, feel free to reopen
> the issue and provide more information.

This seems to be happening randomly. I restarted my PC with reboot command and then restored my old tabs and this started happening again. I don't know the exact steps that would cause this problem every single time, So I am sorry about that. 

I also recorded a minute long video that can probably help in understanding this bug(I hope youtube links are okay to post here), https://www.youtube.com/watch?v=mywhU2zu87c. 

> do you have any custom setting regarding session restore?

No, I do not have any custom session restore settings. Most of my settings are set to default.

Comment 5

[Mike Conley (:mconley) (:⚙️)]

Hi ishanjain28,

Thanks for reporting this. If you're able to reproduce this semi-reliably, can you please try the following experiment?

0) Start OBS to screen record the following steps
1) In about:config, create a new boolean preference named browser.tabs.remote.logSwitchTiming and set it to true
2) Reproduce the issue
3) Use ctrl-shift-j to bring up the Browser Console

I'm interested in seeing what your Browser Console displays when you're in the broken state. No need to switch to more than one blank tab - one is plenty. The recording from OBS will help me map the text in the log to what's occurring on screen.