Blocking a particular browser is very tricky. Ironically, in a network with a Windows Active Directory domain server, one can use LDAP authentication to block IE use. This is probably easier than blocking Mozilla or Firefox.
Out of curiosity, why would you want to block Mozilla, and force all your users to use IE? It would make better technical sense to do the opposite. Microsoft's IE is probably the least secure web browser available. In our office, we have Firefox 1.5 installed on all the PCs, and the staff has been adviced to avoid using IE, except for when they are visiting the Windows update site to get patches.
There is a wonderful Firefox extension, called IE Tab. It use an embedded IE for certain websites that require IE (Windows Update etc.) It's alot easier for users to get familar with one browser, and then you can allow only certain sites to use the embedded IE.
There is a wonderful Firefox extension, called IE Tab. It use an embedded IE for certain websites that require IE (Windows Update etc.) It's alot easier for users to get familar with one browser, and then you can allow only certain sites to use the embedded IE.
That IE tab is cool. IE7 is out now too (in beta). If you are using an active directory domain you could use software restriction policies in Group Policy to block use of mozilla period (asuming comps are part of your domain).