hi, unfortunately your osx & firefox versions are deprecated and will no longer receive updates to fix this issue.

you could try if the following steps could address the crash: first enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named webgl.disabled. double-click it and change its value to false, restart the browser and see if this helps...

Hi Philipp, Thanx for the kind answer. I did about:config. I typed "preference" in search. The results weren't relevant. So the whole list are preferences? ( I'm learning ) I looked for "webgl.disabled"

Found it. The value is already false I left it alone. Shud I just do it anyway? ( double click, "change" to false, then restart browser ) I'm learning.

ah, sorry - i wanted to write in my first reply, that you should try to set the preference "webgl.disabled" to true - sorry for the mistake! please go ahead and try if you can use the site this way...

So i changed it to true. I searched on Medicare. Instead of crashing after it started showing results, it showed the webpage with no results, the top of the results page was there ( no crashing ) but no results: just a white blank screen where the results shud be. i dunno if this is relevant, i tried to log on to Carefirst prior to this ( earlier today ). The password page came up blank. Just a white screen. This was before i changed webgl.disabled

Shud I change webgl.disabled back to false  ? Thanx.

yes, if changing the preference didn't lead to a working site, then you could change it back to the default value again (false).

unfortunately then i think looking into updating your osx version may be the only way to get a browser which is supporting the latest web standards then... Firefox support has ended for Mac OS X 10.6, 10.7 and 10.8 https://support.apple.com/HT206886

Thanx Phillipp. How shud i mark this question? Finished?

There is actually a really good chance that you can update your Mac software. You can check by going to https://support.apple.com/en-us/HT206886

The update is entirely free and will make your computer more secure and more stable. Then, after you update macOS, you can update to the latest version of Firefox.