Hi rimima, glad to see you on Mozilla Support Forum.

Try Refreshing your Browser:-

• To do this, click the menu button at the top right corner of the Firefox window.

• Click the “Help” option near the bottom of the menu.

• Click the “Troubleshooting Information” option in the Help menu.

• Click the “Refresh Firefox” button at the top right corner of the Troubleshooting Information page.

• You’ll be warned that this will remove your browser add-ons, reset your customizations, and revert other browser data to the default settings. Click “Refresh Firefox” to confirm you want to make these changes.

If it doesn't solved your problem, then feel free to ask in Reply Section. Thanks for raising your question in Mozilla Support Forum.

It seemed to help some search windows, for example yahoo, but all my wordpress sights still have the "fl" instead of the magnifying glass. On chrome and edge this is not a problem. They show up with the magnifying glass. I have attached a photo.

You may want to try clearing cache and logging into those sites again.

That fl looks like Firefox isn't recognizing the 'character set' that the website is using for the symbol for the "search" button.

Chrome and Edge support the magnifying glass. Why doesn't Firefox. I am trying to work with you guys, but it looks like your trying to put the blame on Wordpress. If you are not going to accept responsibility, I'll switch. I have used Firefox for a long time, but it's not a marriage.

Hi rimima, can you share a link to an affected page?

The search icon is a character in a font, and for some reason, your Firefox isn't loading or applying that font.

There are several settings and add-ons which may block downloadable fonts. For example, if you use uBlock Origin, it has a "block remote fonts" option that could cause this.

For built-in settings to check, try this solution: https://support.mozilla.org/questions/1270462

Such special icon are usually supplied by a font that is downloaded from the server.

Make sure you allow pages to choose their own fonts.

• Options/Preferences -> General: Fonts & Colors -> Advanced
  [X] "Allow pages to choose their own fonts, instead of my selections above"

If you use uBlock Origin make sure not to "block remote fonts".