Firefox and Cliqz tabs crashing at GOV.UK government pages
Gary Jennejohn
gljennjohn at gmail.com
Sat Apr 11 09:01:57 UTC 2020
On Sat, 11 Apr 2020 09:49:09 +0300
Alexandr Krivulya <shuriku at shurik.kiev.ua> wrote:
> 11.04.20 03:34, Graham Perrin __________:
> > On 08/04/2020 20:23, Graham Perrin wrote:
> >
> > > Firefox 75.0_1,1 tabs crashing or mis-rendering at some www.gov.uk
> > pages
> > >
> > > Most noticeable today at <https://www.gov.uk/coronavirus>.
> > Screenshots available on request.
> > >
> > > AFAICT the same types of problem with 75.0_1,1 on both r357746 and
> > r359628.
> >
> > The problem persists with r359750, is reproducible with a different
> > user account, is reproducible with Cliqz browser. As far as I can
> > tell, only bugging UK.GOV government pages.
> >
> > Occasionally a page will appear OK (e.g. the screen to the left at
> > <https://i.imgur.com/ROO9FIN.png>), more often the page will appear
> > wrong (screen to the right, safe mode).
> >
> > Most often: the tab will crash before the screen can be read. Crashes
> > seem to occur at load time, towards the tail end of content loading or
> > rendering.
> >
>
> I can't reproduce it on my current (r359770, amd64, firefox-75.0_1,1),
> this page loads fine, no any mis-rendering or crashing.
>
https://www.gov.uk/coronavirus works with r359798 also, of course.
I tried it with r359740 using firefox with a java script blocker installed. The
site displayed just fine and only complained about cookies. As soon as I
enabled any one of the two blocked java scripts the tab crashed. Seems
like the site is using some weird java scripts which tickle a bug in
older versions (< r359770) of FreeBSD.
--
Gary Jennejohn
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