Mozilla firefox is usually said to be the great browser for pc and androids but its not.its just the worst one I have ever used in browsers. I first used to use google chrome but the my friend recommend me firefox and when I installed the firefox on my pc and I just had the worst experience ever. the problem in firefox is one its too slow then google chorme, second sometimes just dont download the attachment with mails and the third is it opens new windows automatically without any reason which is just too annoying because its slow your speed and you wont like so many windows on your pc without your knowledge. when ever I used to open my yahoo mail it just does not worl. it hangs or keep on loading the page. and if y chance it opens the page then any attachment on my mail wont get downloaded it just shows and error of downloading failed. so I recommend every one not to use firefox and if you want to have a wonderful experience then use google chrome.