I created some modules lately:
# 1 For those experiencing problems

you can pick a recent firefox version here: http://packages.slackware.com/?r=slackw ... i486-1.txz (convert it by right clicking in your filemanager, rename it 04-firefox.xzm and replace the one in the base folder)
also i put the latest flash stuff in a separate module, for you to pick here: https://drive.google.com/open?id=0B327- ... authuser=0 (just put it in your modules folder, automatically adds the .so file to the mozilla/plugins folder)
# 2 For previewing in Dolphin, i compiled some thumbnailers (graphic, video, pdf, odf, epub ...) and put them in one single module,
get it here: https://drive.google.com/open?id=0B327- ... authuser=0 (put this one in your modules folder too)
Kind Regards,
RiAsRa