I have an old HP Pavilion a720n which will run Ubuntu 16.04 but of course slowly due to the 1 GB memory on board. It WILL connect via Firefox to the internet with no issues. I wanted to use a lighter version of Ubuntu to allow this old computer to run a little faster so I loaded Lubuntu ( most recent ) and Firefox crashes as soon as it is selected to go onto the internet. I have run the built in "check program" files and it finds no errors. Is there a fix for this or should I try a different version of Ubuntu to make the computer run a little faster?