1296919 - possible memory leak on tab closing/opening

Status: RESOLVED WORKSFORME

(Firefox :: Untriaged, defect)

Description

[durdin]

Attachment: firefox window on opening new tab

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:48.0) Gecko/20100101 Firefox/48.0
Build ID: 20160726073904

Steps to reproduce:

Keep firefox running for longer time. Open couple of tabs, close some tabs wait some time. Put computer to sleep (this step might not be needed). After waking up, when the system load is high (eg antivirus is doing something exactly when we need to use computer), hit the new tab button in Firefox.


Actual results:

For a couple of seconds before new tab is opened, firefox hangs for a while, breaking the user interface and you can see that title of the firefox window became the same as title of page in last closed tab (as visible in attachement). This might mean the memory of last closed tab was not freed properly which in some cases might be either privacy problem or/and (I can't confirm this as I haven't possibility to do any debugging) if someone would craft some harmful code used to leak data from the already closed tab this might be the real security problem.


Expected results:

New blank tab should be opened without having refference to any of old tabs memory.

Comment 1

[Tooru Fujisawa [:arai]]

Does the issue happen on safe mode and clean profile?
it might be hard since it will take longer time, but it will help finding out where the issue comes from.

if it doesn't happen on them, it's likely the issue comes from your add-on or some configuration.

Comment 3

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Considering the fact that I cannot reproduce this and the fact that the reporter did not answered to Torru request until now, I will mark this as Resolved-Worksforme.

If anyone can still reproduce it, feel free to reopen the issue and provide more information.