Most Firefox ‘Switchers’ Swap Back
The problem is that figures of how popular the program is could be based on anything from usage patterns to the number of downloads.
Usage is quite easy to gauge and would seem to be more accurate, but usage figures just don’t produce the kind of jaw-dropping numbers that make headlines. Why don't these two figures agree?
Because not everyone who downloads uses it, and not everyone who uses it continues to do so.
Mozilla also has a 12-point plan to increase retention levels, though it's actually an 11-point plan with one item repeated.
Well, I'm not convinced that 25% is such a bad figure. I remove at least 90% of the programs I download and try, often within seconds. Sturgeon's Law applies.”