firefox extensions

[Jan Rękorajski]

On Wed, 06 Oct 2021, Jan Palus wrote:

> On 05.10.2021 23:50, Jan Rękorajski wrote:
> > On Tue, 05 Oct 2021, Jan Rękorajski wrote:
> > 
> > > I can't figure out what the trigger was, but since recently (92+?,
> > > September?) firefox extensions started misbehaving. ex. ublock is
> > > not really blocking adds, and if I try to click its icon all I get
> > > is a single vertical line instead of the menu.
> > > 
> > > So, does firefox extensions work for you? Any hints what's going on?
> > > 
> > > I did try launching firefox on a clean profile, problem persists, and
> > > the same thing happens on both mozilla-firefox-bin and PLD compiled
> > > package.
> > 
> > I also did try downgrading to 91.0 and it looks the same, so, what could
> > have changed recently that broke JavaScript(?) in forefox?
> 
> It appears to be sandbox/seccomp related so perhaps glibc just like
> chrome? Workaround:
> 
> - install ublock
> - modify "security.sandbox.content.level" from "4" to "2"

Works up to here ;)

> - restart firefox and bring back "security.sandbox.content.level" to "4"
> - restart firefox and enjoy ublock

Bringing back to "4" breaks extensions again.

> No idea what's wrong exactly though.

According to https://wiki.mozilla.org/Security/Sandbox#Content_Levels
it's "Read access to most of the filesystem" that's problematic (yes,
"3" already breaks stuff).

Oh, well, at least there is a workaround.

Thanks a lot.

-- 
Jan Rękorajski                    | PLD/Linux
SysAdm | baggins<at>pld-linux.org | http://www.pld-linux.org/