1. Open the bookmark in a tab with a left-click or a middle-click.
2. Click the yellow (blue on a Mac) star on the location bar to open the "Edit This Bookmark" window
3. Click the arrow at the far right of the Folder field to see the folder in which that bookmark is stored.
4. Click the Remove button to remove that bookmark.

You can do that in "File > Work Offline" mode if you do not want to open the link.

This solution works perfectly for removing one bookmark at a time. But I did not clearly state my problem in my original question. I have far too many (hundreds) of book marks, many (perhaps most) of which I no longer use. I want to remove large numbers of bookmarks and I'd like to avoid having to do it one at a time. However, these bookmarks are not in folders, and even if they were I may not want to remove the whole folder. So the real question is, can I remove multiple bookmarks simultaneously. PS - I did find a way of listing them in the library window, but I don't know how to select a group of them and remove them all at the same time.

"I did find a way of listing them in the library window, but I don't know how to select a group of them and remove them all at the same time."

Once listed in the right hand pane of the Library window, in the right hand pane hold down the CTRL button while left-clicking on those that you want to delete, release the CTRL button when you have selected all that you want to delete, then carefully right-click on one of the highlighted items and choose "Delete", all of the highlighted items should disappear from the right hand pane; the un-highlighted items will remain in the right hand pane.

Other Issues: ~~red:You have installed plug-ins with known security issues. You should update them immediately.~~

Update Java: your ver. ~~red:1.4.1_02 (very, very old)~~; current ver. 1.6.0.20 (important security update 04-15-2010) (Firefox 3.6 and above requires Java 1.6.0.10 or higher; see: http://support.mozilla.com/en-US/kb/Java-related+issues#Java_does_not_work_in_Firefox_3_6 ) (Windows users: Do the manual update; very easy.) ~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/ See: Updating Java Do the update with Firefox closed. NOTE: Java version 1.6.0.21 has been released. It is mainly an update for developers of Java applications and most users do not need to be concerned about downloading version 1.6.0.21. At this time, the update option in existing installations of Java 1.6.0.20 are not updating to version 1.6.0.21; at this time, it must be manually downloaded and installed. According to the Java release notes: "Bug Fixes Java SE 6 Update 21 does not contain any additional fixes for security vulnerabilities to its previous release, Java SE 6 Update 20. Users who have Java SE 6 Update 20 have the latest security fixes and do not need to upgrade to this release to be current on security fixes." Source: http://java.sun.com/javase/6/webnotes/6u21.html

Install/Update Adobe Reader for Firefox (aka Adobe PDF Plug-In For Firefox): your ver. 9.3.2; current ver. 9.3.3 (important security update release 06-29-2010; see: http://www.adobe.com/support/security/bulletins/apsb10-15.html) ~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/ See: http://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox#Installing_and_updating_Adobe_Reader You may be able to update from the Adobe Reader installed on your system instead of going to the Adobe site and downloading. Start > Program Files, find and click Adobe Reader to open, click Help, click Check for Updates. Allow the download/update to occur. If you use this method, no need to proceed with the instructions below, but do look at the two bulleted items at the bottom "NOTE for IE:" and "Also see:". Restart Firefox and check your new version here: http://www.mozilla.com/en-US/plugincheck/ If you go to the Adobe site to download the current Adobe Reader: -use Firefox to download and SAVE to your hard drive (save to Desktop for easy access) ~~red:-See the images at the bottom left of this post to see the steps to take on the Adobe site~~ -exit Firefox (File > Exit) -check to see that Firefox is completely closed (Ctrl+Alt+Del, choose Task Manager, click Processes tab, if "firefox.exe" is on the list, right-click "firefox.exe" and choose End process, close the Task Manager window) -double-click on the Adobe Reader installer you just downloaded to install/update Adobe Reader

• NOTE: On Vista and Windows 7 you may need to run the plugin installer as Administrator by starting the installer via the right-click context menu if you do not get an UAC prompt to ask for permission to continue (i.e nothing seems to happen). See this: http://vistasupport.mvps.org/run_as_administrator.htm
• NOTE for IE: Firefox and most other browsers use a Plugin. IE uses an ActiveX version. To install/update the IE ActiveX version, same instructions as above, except use IE to download the ActiveX installer. See: ActiveX
• Also see: http://kb.mozillazine.org/Adobe_Reader ~~red:AND~~ How do I edit options to add Adobe to the list of allowed sites