I am on desktop with W7, Pro.
I am using corporate email, which is Outlook based, Microsoft exchange.
For some reason Firefox is per default using Outlook Web Access Lite to access my mailbox. As a result, entire site is barely working, calendar does not work, I acn only see 1 day on the week at a time, and inbox options are very limited.
IE had same issue but, at least, when I was setting up my mailbox in it, I had option to uncheck "Use Outlook Lite" and IE works with my Exchange mailbox very well.
Firefox, on the other hand, does not give an option to NOT use Outlook Lite.
How do I undo this in Firefox? I have to use one browser for mail and the other one for calendar, as my desktop Outlook refuses to work on this desktop and continuously crashes.
Did all of the above. No change.
IE allows me to chose between regular Outlook and Outlook Light. Firefox will not, it's defaulted to use Outlook Light. This is where my main issue is, I need to undo Outlook Light.
See how it's greyed out in Outlook choice? I have no way to undo it.
Oh, it's Exchange 2007. We never used that one. I see in the small print it says that you need to use IE6 or higher to avoid Light mode. This probably means that 2007 still used ActiveX controls which are proprietary to IE. I'm not aware of any workarounds.
(But maybe you could agitate for an update? 2010 and 2013 are much better in other browsers and have advantages for mobile users.)