As written above, in Firefox select "File" -> "Work Offline". "Work Offline" should now be unchecked and Firefox should now work properly. For Konqueror I don't know a solution.
Do you use a "regular" wireless (wifi) or a wireless UMTS modem? A wifi-connection should be picked up by network-manager and you shouldn't have this problem in the first place.
As written above, in Firefox select "File" -> "Work Offline". "Work Offline" should now be unchecked and Firefox should now work properly. For Konqueror I don't know a solution.
Do you use a "regular" wireless (wifi) or a wireless UMTS modem? A wifi-connection should be picked up by network-manager and you shouldn't have this problem in the first place.