Mozilla released a couple updates for Firefox 33 over the past week: October 24, 2014: Firefox 33.0.1 – Firefox displays a black screen at start-up with certain graphics drivers October 28, 2014: Firefox 33.0.2 – Fix a startup crash with some combination of hardware and drivers Users may be prompted to update to the newest release of Firefox or can do so manually within Firefox by going to Help > About Firefox and following the update prompts. Users may also manually download and install the Firefox update via the getfirefox.com site. The next scheduled update for Firefox is November 25th with Firefox 34.