We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Why does firefox change fonts when I am trying to download or get help, click and enter keys are disabled why?

  • 5 replies
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

more options

I recently did a clean install of windows7 after returning from Europe and installed Mozilla firefox being fed up with microsoft and google .

Fire fox seemed to be working ok but 7 out of 10 downloads were failing, and it seemed that every ebsite entered in the address bar turned into a question.

There was no save shortcut, or paste buttons just a set of to me useless buttons first html, last html, then when I tried to contact help all of a sudden I got a "install fonts" notice and the enter key stopped working, and any action key was also disabled without advising me.

It appears that either Mozilla or someone doesn't want me using firefox.

I also noticed that the clean disk and other utilities didn't work and that the temp and temp internet folders were empty when I tried to open them but they actually had some 25 megabytes in them when queried as administrator. I also noticed a quick flash reference to Jscript=void, and my 32 bit computer suddenly started up as a 64 bit Turion.

scan and system clean said machine was clean.

Whats going on here?


I am not on my machine, I can't contact you on it because the enter button has been disabled by font change.

Maybe this robot needs some help too!

I recently did a clean install of windows7 after returning from Europe and installed Mozilla firefox being fed up with microsoft and google . Fire fox seemed to be working ok but 7 out of 10 downloads were failing, and it seemed that every ebsite entered in the address bar turned into a question. There was no save shortcut, or paste buttons just a set of to me useless buttons first html, last html, then when I tried to contact help all of a sudden I got a "install fonts" notice and the enter key stopped working, and any action key was also disabled without advising me. It appears that either Mozilla or someone doesn't want me using firefox. I also noticed that the clean disk and other utilities didn't work and that the temp and temp internet folders were empty when I tried to open them but they actually had some 25 megabytes in them when queried as administrator. I also noticed a quick flash reference to Jscript=void, and my 32 bit computer suddenly started up as a 64 bit Turion. scan and system clean said machine was clean. Whats going on here? I am not on my machine, I can't contact you on it because the enter button has been disabled by font change. Maybe this robot needs some help too!

All Replies (5)

more options
more options

Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

You can use the System File Checker to check if font files are missing or corrupted.
Open a cmd.exe window as Administrator:
Start, click Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
After the cmd.exe prompt, type: sfc.exe /scannow

System Files - SFC Command - Vista Forums:

more options

Thank you for your response, It took me a while to find out how to open your response, because I didn't realize that I had to click on the text displayed in my profile screen.

I don't know if it helps or not but I will follow your suggestions and get back to you later today.

Sorry I'm so slow but at 80 nothing comes easy.

thanks again

more options

system restore did not work.

it apparently did not restore and did not notify of the failure.

apparently what happened is a partial restore, which for some reason deleted something called my profile.

now I can't start firefox, and I can't delete it, The "uninstall.exe" is now a text file and doesn't go anywhere.

Sorry I couldn't get online earlier but internet is not working, am using another machine for this response.

more options

Can you undo the system restore?

Note that using System Restore can cause your Firefox installation to get corrupted because not all files are restored (only files in a white-list), so be cautious with using System Restore.

  • You may lose data in the Firefox profile folder like .js and .ini files pr profiles.ini can be affected.
  • You may need to (re)install software that was affected.

In case you need to reinstall Firefox then you need to delete the Firefox program folder before reinstalling to make sure that all files get replaced.


A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.

See: