embedded videos wont play

2. I'm experiencing a lag when I type. Applies when I'm searching, writing web addresses, and when I'm filling out forms like this one 

'''' 1. Embedded videos won't play (eg. Facebook, CNN). I can hear audio but the picture is black with occasional flickers of the video'' There was a feature released that was causing black web pages, however there were updates to block the graphics drivers that were affected. I would first check to make sure that your graphics drivers are up to date. [[Upgrade your graphics drivers to use hardware acceleration and WebGL]] '' 2. I'm experiencing a lag when I type. Applies when I'm searching, writing web addresses, and when I'm filling out forms like this one '' Since there is a lag when you type, I suspect two things: one that the feature that remembers form content is too big or that a script running may be consuming resources on your computer. Please check to make sure all your add ons and plugins are up to date: https://www.mozilla.org/plugincheck/ '' 3. When I type in the search or address box of Firefox I see a blue rectangle where I'm typing. '''' Does this improve after updating the graphics driver or disabling hardware acceleration? If not, please run a virus scan. [[Troubleshoot Firefox issues caused by malware]]