I have firefox quantum v66.0 (64 bit). When I check for updates under help/about an update download begins but then my computer crashes with an APC Index Mismatch stop code. When I log into firefox I get a page offering a down load of firefox quantum which I already have. Sometimes when open firefox I get a dialog box asking permission to update firefox. Clicking yes results in a blue screen crash with the APC index mismatch stop code. My operating system is Windows 10 home 64 bit. I can use firefox if I don't attempt the update but would like to have the latest features. Should I perform the offered download? Is there another solution.\?