Please check if all your plugins are up-to-date. To do this, go to the Mozilla Plugin Check site.

Once you're there, the site will check if all your plugins have the latest versions. If you see plugins in the list that have a yellow Update button or a red Update now button, please update these immediately.

To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

These add-ons can help.

Flash block {web link} Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on it

DeferredTo faster Firefox web browsing {web link} DeferredTo strives faster web page loading. This extension loads content which is in the visible area of the page first. It defers loading of content that is below the visible screen. Large size content loaded just in time: images, media and frames