I have never seen a firefox add-on called that, I did a search on firefox extensions page and nothing with realplayer in the name even came up. That is a new one on me. You can always try getting Real Player again should you find you need it. Or you can get something like Real Alternative which will play Real stuff and is light and easy. Download Real Alternative RealPlayer as stated by MozillaZine you have 2 alternatives for Real media. since you gave me the exact name I googled it and sure enough it apparently does appear for some people and it looks like it is causing a lot of problems and it can be disabled here are the results Here is a link that might be useful: search result

Your Good! the advisories included these versions:Software: Mozilla Firefox 3.0.x, Mozilla Firefox 3.5.x I don't understand why anyone would run those versions anyway. This was the whole thread below and the link where I got it. Firefox v3.0.18/v3.5.8 released - http://secunia.com/advisories/37242/ Release Date: 2010-02-18 Criticality level: Highly critical Impact: Cross Site Scripting, System access Where: From remote Solution Status: Vendor Patch Software: Mozilla Firefox 3.0.x, Mozilla Firefox 3.5.x Solution: Update to version 3.0.18 or 3.5.8. Original Advisory: Mozilla: http://www.mozilla.o...fsa2010-01.html http://www.mozilla.o...fsa2010-02.html http://www.mozilla.o...fsa2010-03.html http://www.mozilla.o...fsa2010-04.html http://www.mozilla.o...fsa2010-05.html Secunia Research: http://secunia.com/s...search/2009-45/ Bug list: - https://bugzilla.moz....9.1%3A.8-fixed 63 bugs found. Fixed in Firefox 3.5.8 - http://www.mozilla.o.../firefox35.html Fixed in Firefox 3.0.18 - http://www.mozilla.o.../firefox30.html http://www.spywareinfoforum.com/index.php?showtopic=118191&st=15

it could have been a bad pdf link or file, do you have a pdf reader program, have you been able to open and read them ok in the past? I would try a few sites that have pdf files and see if it was just a one time thing or if it is a consistent problem.

After you have been surfing the web for awhile, a lot of temporary files gets stored on disk. Some of these are used to quickly display the contents of re-occuring frames on a page. You can clean up your hard drives with a built-in utiltiy in Windows. Double-click "My Computer" (or single click depending on your settings). My Computer> right click on a hard drive> properties> Disk Cleanup. The system will compute the amount of space used by temporary files and display the results. Highlight (click on the selection box) the files you'd like to remove, then click "ok" or "apply" whichever is applicable. The two biggest space hogs are: Temporary Internet Files Temporary Files These can be safely removed, however, there may be minor information 'remembered' in these files. The next time an old site is re-visited, it may take a little more time to load the page because it is starting with a clean slate. As you brouse, new files get written to the temporary space on your disk. Another file that can grow to large size is the browsing "history" file. This is the file where the URLs( addresses of sites visited) are kept. There are user settings to control the size of this file. To access in Win XP: Control Panel > Internet Options > General Tab > On the general tab, find "Browsing History" and click on "settings". Near the bottom of the "settings" panel, find "no. of days" to keep history. A common setting is 20 days. Set this to whatever you like. Addresses (URLs) older than the setting will be dropped off the list. These are the addresses that appear in the drop-down list when you click on the down caret next to the address box at the top of your browser.