There is known problem going on with Real player plugin with latest verion of FF. you may have to wait until it get resolve.

then how do i enavle the download button for videos in you tube and other movie sites that play videos

Try with Firefox Addons like

• https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper

• https://addons.mozilla.org/en-US/firefox/search/?q=video+download

how can i get the real player download bar again the above link still does not help me download videos from web-sites

Remove the Realtime player and reinstall it..

i have done that too 3 times but it still does not solve the problem

Type about:addons in URL and goto Plugins check whether Realtime player is enabled or not

the real time player is not visible in the add ons thats what i am saying in firefox browwser

Create a new profile as a test to check if your current profile is causing the problems. See "Creating a profile":

• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

Profile Backup and Restore

• http://kb.mozillazine.org/Profile_backup
• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Solved the whole Real Player-Firefox issue. Simply go your control panel, select "Programs", under "Default Programs" click on "Change default settings for media or devices". Find Video Files and choose Real Player logo to Import Music, Video and Pictures using Real Player. Click "Save" at the bottom of the window, then closeout and restart Firefox. You should see the "Download this Video" icon in YouTube videos once again and download at will. One caveat, it seems to work great on amateur videos and the like. I had an issue downloading some music videos. It's kind of hit or miss, you will have to keep trying to download a video if it doesn't work initially. I noticed that it downloads videos as a .dash file and then Real Player downloader will convert the file to mp4 or whatever format you have it set to in your preferences. These directions are for Windows 7, you will have to find the equivalent control panel options for other Windows OS. Good luck!