Yesterday before going to bed I rebuilt Mozilla Firefox from source to see how well it would work.
Took a good few hours to finish the build, but it was very straightforward:apt-get install debian-builder debian-builder --verbose mozilla-firefox cd /var/cache/debian-builder/debs dpkg --install mozilla-firefox*.deb
No major problems detected so far, plugins all continue to work, as does java.
There’s a problem with the builder though, about 8 packages which were installed to complete the build were not removed – so I had to remove them manually.
Maybe builidng inside a chroot-jail would work better?