msn.com does not work with Firefox.
The tab has the address and Bing logo, but the page is all white. Worked fine earlier but doesn’t work now.
When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.
(1) Bypass Firefox's Cache
Use Ctrl+Shift+r to reload the page fresh from the server.
Alternately, you also can clear Firefox's cache completely using:
orange Firefox button (or Tools menu) > Options > Advanced
On the Network mini-tab > Cached Web Content : "Clear Now"
If you have a large hard drive, this might take a few minutes.
(2) Remove the site's cookies (save any pending work first). While viewing a page on the site:
Then try reloading the page. Does that help?
Note that if you log in to msn.com through live.com or another Microsoft site, you might need to clear cookies for that site as well.
If you use extensions (Tools > Add-ons > Extensions) like Adblock Plus or NoScript or Flash Block that can block content then make sure that such extensions aren't blocking content.
There appears to be a new MSN for Firefox 1.0 extension that has been enabled by default. I removed the site's cookies and disabled this extension and it is finally working again.