All Products Support Forum

Since installation, Firefox 3.6.16 has crashed four or five times. I'd like to take it off my computer and reinstall Firefox 3.6.15, or whatever the previous version was. Can I do this? And how do I do this?

I tried downloading the new firefox 4.0 with mac os x version 10.4.11. After it was done downloading there was a white sign over the firefox icon and it won't let me open it. it says that it's not supported with this system

My home PC obviously downloaded the file for later installation. It looked like a Firefox file, but I came to install the file, the source was a name xxxxxxxxxxx.cz Does Mozilla originate in Czechoslovakia?

Why does it say in the Firefox Safe Mode article that all of the changes are temporary while in Safe Mode, then later it says "Note: The following changes cannot be undone."?

I have Firefox 3.6.16. Since installing it, my menu bar often is not operational....So even though I click on the Tools or View category, no options box shows up.

A few days ago I could not get my Yahoo! icons up nor Yahoo's Search box--at least that's working now; but the menu bar is behaving strangely.

Does anyone know why this is happening?

Thank you for your consideration. marlem388

I have been using Firefox 3.6.16. successfully for years, occasionally updating.

As suggested, I now downloaded Firefox 4. The Firefox 4 icon is on my desktop and also I have dragged it into my Applications file. On trying to go futher I am told it cannot be opened on this system. I am using MAC OS X, 10.4.11

The newest download for my computer was 3.6.16. Apparently 4.o does not work on non Intel based systems. I am concerned about security using 3.6.16. Does anyone know if it is safe to use this one?

When trying to download Firefox 4 on March 25th 2011, I was advised my MultiBookmarks Toolbar 5.0 would be disabled. This Firefox approved add-on has been EXTREMELY helpful to me. I'm hoping Firefox 4 will be able to support MultiBookmarks Toolbar 5.0 in the near future.

 I suppose I'll have to take down manually all my toolbar bookmarks info. 

And then re-enter that info in a less visible way onto FF 4, if MultirowBookmarksToolbars 5.0 is not supported. Bummer.

After upgrading to Firefox 4, when I started it from a URL shortcut on the desktop an error message appears stating the URL can't be found but Firefox still starts and displays the URL requested but the error message remains until its OK button has been clicked. It has become so irritating that I have downgraded to Firefox 3.

This seems like the obvious information to have in the introduction to any 'upgrade' document. What will I gain' seems hyped, 'what will I lose' seems ignored. I spent a year or so, gradually getting Firefox 3 amended, setup, & configured as rqd for my needs, into a comfortable tool. Will I have to suddenly stop my actual work, to re-learn how to get all the (18) plug-ins, and passwords, and add-ins, etc. re-installed and working again? or can I hope that the new install brings those forward? I have been unable to find any mention of what happens to the setup of the old version. Must I look forward to a month or two of re-solving last year's problems for the new version?

3 computers (all Win 7, 64 bit): 1) upgraded to 4.0 from 3.6.16 and since reverted back to 3.6.16 2) upgraded to 3.6.16 from 3.6.15 3) completely new 4.0 installation. When browser is opened to home page and any link (or bookmark) is selected, the back arrow stays grayed out and the currently selected page becomes the "anchor" page that can be returned to. Same behavior on all three computers.

I downloaded and installed Release 4.0 to my Laptop running Windows Vista Home Premium Service Pack 2. Firefox 4 started and went into an unresponsive state with high cpu. Had to end Firefox 4 from the task manager. Read in the forum a point about McAfee Site Adviser causing a similar problem so I deinstalled that product but still had the problem. I was able to start Firefox in Safe mode so I suspected an Add-on. Downloaded and installed Firefox 3.6.16 and am having the same problem.

1) How do I display the installed Add-ons? In safe mode it states they are disabled, but does not list them. 2) How can I isolate the problem? Thanks in advance.