If you're managing Firefox deployment in a business, though, or anywhere else with a large number of users, then it's a different story. Firefox ESR will remain at v68 for many months, so you'll be missing out on all the new interface tweaks, tab options and assorted browser speeds which Mozilla have added in the past few months.

If you're a home user then this probably means that Firefox ESR isn't for you. Every time standard Firefox is updated, Firefox ESR will incorporate all the latest security updates in its own minor upgrade, so the program will be every bit as safe to use: you just won't have all the latest features. Of course this doesn't mean the browser will see no movement at all for an entire year.

While standard Firefox sees a major release every 6 weeks or so, Firefox ESR will only move a whole release number every 54 weeks, meaning that you're much less likely to find some new tweak has broken your favourite extensions. However, if you use both Firefox and Mozilla's e-mail client Thunderbird, Sunbird is an ideal calendar component although most would probably be better sticking to iCal.Mozilla Firefox Extended Support Release (ESR) is, essentially, a slower-moving, more stable version of the regular browser. It also doesn't seem to be updated very often and looks like that Mozilla have put it on the back-burner for now. On the downside, Sunbird doesn't feature integration with either iCal or Google Calendar, which you'd expect as standard really. You can also extend Sunbird with a series of free add-ons from the Sunbird site. Like most of Mozilla's products, it also seems very safe and allows you to set a password to access it. There's also a powerful search tool that finds events by keyword. Adding an event simply involves clicking on the 'Add Event' box in the top left-hand corner. The interface of Mozilla Sunbird is very simple.

Firefox free download for mac