Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own.

Fonts Information - Detected via Flash http://browserspy.dk/fonts-flash.php?detail=1

hi, are you using any third-party font managers on the affected system?

< Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own. >

thanks Fred, but this was already selected by default. So must be another fix.

< are you using any third-party font managers on the affected system? >

Philipp - Yes. Using Suitcase Fusion which is updated for my OS - Yosemite. Same SF version which worked fine with previous FFox version. Being a graphic designer, a font management program is basically vital. thanks

< Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own. >

Even though this selection is checked by default, I'm still seeing this on some websites (attached)

thanks, we're tracking the problem in https://bugzilla.mozilla.org/show_bug.cgi?id=1460917

as a workaround in the meantime you could try the following: enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named security.sandbox.content.level. double-click it and change its value to 2 and restart firefox once.

< as a workaround in the meantime you could try the following: enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named security.sandbox.content.level. double-click it and change its value to 2 and restart firefox once. >

thanks philipp. Unfortunately no go. Remains same gibberish. Should I change value back to 3? Thanks for tracking problem.

You can try 1 for the value of the pref like the user reported in this thread.

• /questions/1217480 Weird "???" charaters in some webpages (font loading error?)

You can set this pref to 2 or 1 on the about:config page to lower the sandbox security setting.

• security.sandbox.content.level = 1
• close and restart Firefox to make the change effective.

If '1' still doesn't have effect then try '0' to disable the sandbox.

If this didn't work then undo/reverse the change and reset the pref via the right-click context menu to the default value.

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

• http://kb.mozillazine.org/about:config

< You can set this pref to 2 or 1 on the about:config page to lower the sandbox security setting. >

Hallelujah!!! Magic '1' worked. Big thanks Cor-el ! AOL & Yahoo normal. Haven't tried various sites yet but presuming all is back to normal.

Also praying for restorations in your life and others in this thread who made the effort for solutions.