Did you visit the feed URL to make sure that the feed is still valid?

Try to remove that feed and add it again (Subscribe to This Page) by visiting the affected websites.

The feeds are valid. I did try deleting them, restarting the computer, and then adding them back in. Same problem occurs.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

You can check for problems with the places.sqlite database file in the Firefox profile folder.

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
• https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file

I have tried running in safe mode without the add-ons, but still have the problem.

I don't believe my places.sqlite file is locked as I can add/remove bookmarks just fine.

I guess the next step would be try rebuilding the places.sqlite database?

Yes you can try that.

You can move the places.sqlite file to another folder or rename the file (places.sqlite.old).
Firefox should rebuild the bookmarks from the most recent JSON backup in the bookmarkbackups folder.

Ok, I tried that and nothing changed. The next thing I tried was removing the JSON backup files so that I'd be starting fresh with my bookmarks. I added the live bookmark for this site again and it gives me nothing newer than July 8 even though there are 5 newer entries.

Is there anything else I can try, or should I assume that this is a problem with the blog I'm following and not me?

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.

Download a fresh Firefox copy and save the file to the desktop.

• Firefox 22.0: http://www.mozilla.org/en-US/firefox/all.html

Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.

• Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

• (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
• (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

• It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
• http://kb.mozillazine.org/Uninstalling_Firefox

Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.

If you keep having problems then also create a new profile.

• http://kb.mozillazine.org/Profile_folder_-_Firefox
• http://kb.mozillazine.org/Profile_backup

• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

I'm on a MAC so I don't have the "uninstall" feature, I have to manually delete the application and it's folders. However, if I make a copy of my profile directory elsewhere, I should be able to just move that back after I reinstall, correct?

Interestingly, I did use my other computer yesterday and it has the same live bookmark problem with this one website.

Reinstall did not work. :( Guess it's a problem with the blog or a bug in Firefox?

The live bookmarks magically started working again! Must have been something with the blog I was following as I've changed nothing recently.

I have 4 live bookmarks from searches of Craig's List, and all worked without a hitch. Today, I revised a search, deleted the old live bookmark, and created a new one. That one consistently tells me "Live Bookmark failed to load". The other 3 are working. I deleted that live bookmark with the error, and created another. Same failed-to-load error. I started Mozilla (using Pale Moon flavor) in safe mode; still the same error.

Since the other three are working, and the original fourth worked until I deleted it, I'd like to avoid the clean reinstall of Mozilla if possible. Is there anything else worth trying first?