For example, when I go to my online newspaper, lohud.com, I can play the videos they offer on Internet Explorer and Chrome but not Firefox. I heard the the problem is that Firefox is not always compatible with Shockwave Flash 11.5 but I don't know how to fix it. I have Windows Vista and a Sony Vaio VGN-NS190J laptop. My internet provider is Optimum.com and Yahoo is my homepage.
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.
Thanks for your answer but all my plug-ins are up to date already so that isn't the problem.
In order to uninstall a possibly unwanted extension, please do the following:
You can find further information about uninstalling extensions in the following articles:
I appreciate your taking the time to try to solve my problem with getting firefox to play certain videos that I am able to see on chrome and internet explorer. Thanks for trying to help but it's not an unwanted extension that's causing the problem and frankly, it's not that big a deal.
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).