Changes

::::: I recommend having sections for each version that there is info on the page for, not throwing away the knowledge gained in this wiki. Though I also recommend getting rid of info on especially old versions that are completely outdated, such as Firefox 1.0. I don;t think people here should be making judgements such as "because everyone who'd like to install v2 should use v3" - the systems we setup, where an on-site admin might continue to update Firefox 2.x within the remit of their current software suite, but not have the ability to move to our new suite with Firefox 3 yet, can keep going with 2.x until the time is right; people here shouldn't be supposing they know when precisely people are able to upgrade, when we're only talking about the previous major release series.