There's no way to know the problem from your
description. You'd need to look for patterns in the
way the page is coded. Extensions could possibly
be the culprit, but they usually aren't, despite the
fact that they're by far the most widely suspected.
Whenever there's any browser problem, half of the
respondents will tell you to disable your extensions.
1) Think twice before updating software to "bleeding
edge" versions. If you *must* use risky software like
Flash it should be kept updated. Otherwise, in most
cases you're just working as an unpaid beta tester by
getting the latest when it's released, usually for no
In the case of Firefox, Mozilla has been breaking it
by bits and pieces, removing user-friendly functionality
to satisfy their boss, Google. (Yahoo has recently
contracted to provide default search in FF, but in the
past nearly all of Mozilla's $100+ million/year budget
has been coming from ad company and privacy enemy
Google.) So updating FF is a crapshoot. There's no
telling what might have been broken or foisted onto
people in their latest remake.
2) Search online for other reports of similar problems,
such as "rollovers not working Firefox 35". Someone might
have already done the work you're now faced with.
second guess would be the use of unsupported CSS
in the webpages. But guess #2 is very unlikely in the
Unfortunately, newer versions of FF have actually
with an add-on:
Then try going to Options -> Content and click the
are some options there. But what you'll really need to
check is the user_prefs, which is an abstruse mess.
If you're feeling ambitious, enter about:config in the
address bar and click Enter. In the search field enter
"dom" (without quotes). Dom stands for document object
model. The settings that start with dom relate to what
that's a recent ability and requires a web designer who
knows what they're doing. The vast majority of rollover
not easy to understand what you're looking at in about:config.
I don't see anything specific to rollovers. But you might
check that this setting is set to false:
The calendar problem could be related to script settings
related to opening new windows, but that's just a wild
guess. There's no way for anyone to know what's not
working with your AT&T webmail. First, most or all of us
don't use AT&T. :) Even if we did, you didn't describe
what doesn't work. (Have you considered getting your
email through a real email program? It's much better
functionality than webmail.)