> > Currently Firefox tabs are not separate processes. Mozilla
has been
> > working on it for a while now but it will mean a change to the add
> > -ons
> > system. See
> >
http://arstechnica.com/information-technology/2015/08/mozil
> > la-sets-plan-to-dump-firefox-add-ons-move-to-chrome-like
> > -extensions/
>
> I don't think it follows from this that javascript running in
> background tabs couldn't be suspended. Actually, the existence of the
> extension Roberto mentioned above seems to prove that they can.
No doubt that is true, but my point is that Mozilla are working on a
more comprehensive change so I doubt they'll bother with an interim
solution such as this. Especially as they could have done it at any
time in the past.