Please try disable Flash block to make sure that there is not interference with you default video player. To check to make sure that there is not another add on causing this as well please try Diagnose Firefox issues using Troubleshoot Mode to see if it is an add on.

Hello,

Thank you for your prompt reply. Although it seemed to work initially as soon as I disabled the Flash Block extension, it was short-lived and mostly in Chrome. I also tried troubleshooting in Safe Mode, but only worked in Safe Mode.
I finally decided to Reset Firefox (for the second time in 3 days) and this is where I am.
Many thanks again for your interest and patience and for setting me up in the right path.

Best regards

J.V.

HI Juanverano, Not a problem, Safe Mode will disable addons and hardware acceleration. If this continues and it is not an add on this will be the next step to try to disable acceleration:

Try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.

You might need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).

Then perform these steps:

1. Open Firefox Options window (Preferences on Mac or Linux) as follows:
   • In Firefox 29.0 and above, click the menu button and select Options for Windows or Preferences on Mac or Linux.
   • In Firefox 28.0 and previous versions, click the orange Firefox button at the top left, then select the "Options" button, or, if there is no Firefox button at the top, go to Tools > Options.
2. In the Firefox Options (or Preferences) window, click the Advanced tab, then select General.
3. In the settings list, you should find the Use hardware acceleration when available checkbox. Uncheck this checkbox.
4. Now, restart Firefox and see if the problems persist.

Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

• Upgrade your graphics drivers to use hardware acceleration and WebGL

Did this fix your problems? Please report back to us!

Thank you.

Hello, Well, yes. Although I could not pin point which one of all my extensions was causing the problem it looks like I'm back to normal with Firefox. I am so relieved... and it looks so much faster to me! I don't know. Maybe Chrome was making wait too long for everything. Well, that's done and thank you again.

J. V.