Diễn đàn hỗ trợ Firefox

My Firefox wired for a few years. All of a sudden It replace all text on all websites I visited with boxes with the letter A in it.I want to fix it without losing my bookmarks or the user/ password files. I am on a Mac running OS 10.9.5 and running Firefox 56.4 (64 bit) on a mid 2010 Mac Pro tower.

I just updated to v56.0 on a Mac a few days ago, now on many of the bigger sites I go to I am experiencing outline boxes instead of words. Makes it impossible on some sites to navigate. Amazon happens to be one of those sites. Ironically, it was happening on Mozilla's site the other day. That seems to work now. Any ideas?

On a number of webites, boxes with questions marks and/or dollar signs appear instead of legible type. The sites open up cleanly on Safari. I looked at the View > text encoding, and they are Unicode. Any thoughts?

Parts of a web page displays as a capital A in a box - see the attached screenshot. I have tried changing various settings to no avail. The problem is not restricted to just this website.

firefox was running a little slow, so I recently refreshed it, following the instructions outlined in this article https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings it was working fine for a short while and now certain pages such as facebook and twitter are displaying jumbled characters. I tried restarting which fixes the issue but only for a few hours. I also tried uninstalling and reinstalling firefox with no luck.

Ever since the new upgrade the text is working incorrectly. On some sites I just get boxes of A's where the letters text should be. I have already lost my bookmarks trying to fix the problem.Firefox finally started working yesterday and after restarting the computer, the browser works on some sites and does not on others. Why is Firefox automatically upgrading when the new browser has such problems? I can not use it as is.

Attached is a sample image.

Even though I haven't changed any settings or fonts/font preferences, Firefox has started (out of the blue) displaying all of the text on my screen as questions marks inside boxes. This happens on Google and many other websites, but not every website. For example, it happens on Google, while it does not happen on Facebook, but it happens when Facebook displays another website on its page. This first happened yesterday on my desktop iMac. My laptop (Macbook Pro), however, has been fine all day...until about 30 minutes ago, when it too began displaying all text as question marks inside boxes. I have read a lot of online forums to see what others have done in this situation, and I have tried most of the troubleshooting suggestions, to no avail.

This seems to have started in v56.0 for Mac but if "allow pages to choose fonts" is selected (has been default), several pages display "????" instead of fonts...if this is then unchecked in prefs, those fonts will appear correctly, but others (certain things like symbols...) do not...need to keep going back & forth into prefs to see all pages legibly...

I've updated everything - Firefox and OS. Text shows up, but some headings and infographics are all showing up as question marks. I've checked all settings - Text encoding is Unicode I've tried checking and unchecking "Allow sites to choose their own fonts". This affects body copy, but not the info graphics and some headings. I think it's a font issue - I'm running the newest FontAgentPro - but I can't seem to fix it.

hello,

since today I notice that all text in firefox (56.0 mac-version) on certain sites appears only in question marks (in suqares). looks like that on sites like mozilla support (busy right now in safari) google.com, my banking site, tmobile, gmail and a lot other ones too. all those sites show totally normal in other brouwsers.

did the following troubleshoot 1) view > text encoding > unicode = OK 2) preferences Font & Color > advanced > checked 'allow pages to choose their own font' = OK

any other suggestions? (:

tried to enclose some screenshots (small jpg and png files) but the upload keeps spinning for ever... never mind.

thanks in advance for any help on the questionmark problem.

suddenly 2 days ago, everything on my firefox window showed is [A]. I searched for solution, and the suggestion is not keep the "Allow pages to choose their own fonts, instead of your selections above" which is already checked. However, it's all [A] see attachment. If I unchecked the box, everything looks pretty much normal, except when I search, the search word would become [A] at some website. I tried to reinstall the firefox, but didn't help at all. Is there anything I can do to fix the problem?