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Open source company Mozilla is asking users of its Firefox browser to upgrade to version 3 if it has not been done already, it has emerged.

The browser's users now receive a pop-up window which alerts them to the latest upgrades in the third incarnation, giving them the chance to upgrade to the next version immediately, postpone the invitation for 24 hours or decline completely.

People who upgrade will have to accept new terms and conditions due to modifications by Mozilla's tech support that required it to update its end user licence agreement, such as malware protection.

The company promoted freedom of choice however, by saying that those who still wanted their "favourite add-on" could go back to the product website to re-download an older version.

Mozilla added that more than 90 per cent of add-ons had been updated to be compatible with Firefox 3.

Yesterday, it was announced that an experimental extension called Ubiquity was being tested by Mozilla that allows people to substitute basic text commands for difficult or intricate internet tasks, such as links in email messages.

More than half of small businesses (53%) believe that the most important benefit of outsourcing is guaranteed response times for IT support, London based Connect conducted the research in 2007.