i use opera and firefox it went so slow that i have to disble the shields to open the pages as its hampering my work and what do u meean by "MF"
MOZILLA FIREFOX abbreviation (MF) for those that know!,it takes 4 seconds for mr to open MF from double clicking icon on desktop(this will be either slower or faster depending on the amount of extensions,addons you have enabled!?,open all pages immediately on all sites i have typed in 50 so far.
I also use opera too have done so for years,in fact i always thought it was a faster browser tha MF,anyway opera for me version 10.10 takes 7-10 seconds to open up its browser from start double clicking on desktop shortcut and 3-7 seconds to get most of same sites i typed in,this does vary of course depending on the sites,maybe you have somethings else slowing your pc down or a software conflict with avast this did occur last year with avast malwarebytes,norton to name a few,but i think these conflicts have been resolved now.