Does this happen everywhere on Tumblr, or are there particular pages? If you can give a URL or two and say whether you are accessing it logged in or logged out, someone can take a look and try to figure out what plugin Firefox is looking form.

I have the same problem. It keeps coming up on every website.

Additional plugins are required to display all the media on this page then I click on the button next to it that says install missing plugins and it says no suitable plugins are found...

Help please...

Hi abudardaa, I can only think of one plugin that nearly every page requires...

Do you have the Flash player installed and enabled? You can test on Adobe's page here:

http://www.adobe.com/software/flash/about/

Could you also try Firefox's Safe Mode? That's a standard diagnostic tool to bypass interference by extensions (and some custom settings). More info: Diagnose Firefox issues using Troubleshoot Mode.

You can restart Firefox in Safe Mode using

Help > Restart with Add-ons Disabled

In the dialog, click "Start in Safe Mode" (not Reset)

Any difference?

You can install the new WMP plugin (np-mswmp.dll)

• https://support.mozilla.org/kb/Using+the+Windows+Media+Player+plugin+with+Firefox
• http://kb.mozillazine.org/Windows_Media_Player#Missing_plugin

You may also need to install Java.

• https://support.mozilla.org/kb/Using+the+Java+plugin+with+Firefox

You can find the latest Java version on the Oracle website.

See Java Platform > Java SE 7U25 (JRE Download)

• http://www.oracle.com/technetwork/java/javase/downloads/index.html

One footnote on Windows Media Player: Windows Media or other plugins stopped working after Firefox update.

very good thnaks.

Spam removed my moderator. Please read the Rules & Guidelines.

Hello,

Sorry for the delay, it was my work computer. Haven't been to work for a while...

I installed Adobe Flash Player and it was gone.

Thank you all for your responses!

ducky_howard and abudardaa install the latest flash player if problems continue:

http://get.adobe.com/flashplayer/