[Pkg-mozext-maintainers] Bug#906854: xul-ext-firexpath no longer works with firefox-esr 60

[Moritz Mühlenhoff]

On Tue, Aug 21, 2018 at 09:00:13PM +0300, Adrian Bunk wrote:
> Package: xul-ext-firexpath
> Version: 0.9.7.1-3
> Severity: serious
> 
> XUL addons are no longer supported.

Seems dead upstream, let's remove?

Cheers,
        Moritz