Fix taktuk

According to the following message to import TakTuk from Debian repo.:

https://listas.trisquel.info/pipermail/trisquel-devel/2016-April/000996.html

You may reject this merge request freely ;)

See merge request !148

remove unrar (non-free) suggestion

See merge request !146

Adding firejail to Trisquel's repos

firejail is a program design to isolate web applications.

Adaptations to the package has been made to make the application compatible with abrowser. It was also necessary to purge any proprietary software references and configuration files.

See merge request !143

Abrowser KDE Integration

These are the KDE integration patches for Abrowser. With every new release, the patches in the DATA directory should be updated from https://www.rosenauer.org/hg/mozilla.

I will make another merge request for the mozilla-kde-support (or kmozillahelper) package that goes along with the patches. Note that these patches have no effect on non-KDE systems.

See merge request !144

Add mozilla-kde-support package

This adds the mozilla-kde-support package mentioned in !144.

See merge request !145

Updated debian/config/searchplugins.conf accordingly

Closes #12545