As of the time of this comment a lot of people are missing the point which is about respecting the user's choice not to upgrade. To answer the question though,

As of the time of this comment a lot of people are missing the point which is about respecting the user's choice not to upgrade. To answer the question though, I'd say maybe not the only one but you're probably part of an incredibly small minority. If you had the update feature off and this happened then it's certainly not right but if it was on and you received many notices already then you had plenty of time to turn that feature off. I'd ask what reason anyone would have to keep such an old version though? I do understand its a choice but outside of some really narrow edge cases I can't really see a good reason to keep 3.6. This raises so,e very interesting questions though if in fact you had the update feature explicitly turned off. We all can agree that updating your browser even somewhat regularly is great for both users and developers but respecting the users choices is also almost a duty that software developers have. To me this is a gray area. Considering how old and outdated FF3.6 is and that web standards change so rapidly and have a lot since 3.6 was it a good call for Mozilla to pull the trigger and upgrade users of ancient FF versions or is it more important to respect the user's choice? I think they made the right call. We think of using a particular browser at version X as a choice but in reality the majority of people do not choose this. They get whatever came out at the time and then never think of it again. For most users their inaction when it comes to upgrading isn't really a conscious choice to stay at the version they have but instead just a side effect of not knowing enough to be able to choose to upgrade or not having the time to be bothered by the prompt and clicking "No" on whatever comes up (I can see that especially applying to Windows users as there seems to be a prompt popping up every other second). At a certain point there are so few reasons not to upgrade that it makes sense to do it for the user automatically. Even if a user, somehow, some way, is using an old version of FF for testing a website in development or has somehow gotten into a situation like many corporate IE users face where certain websites or apps can only be access with version X it's very reasonable to assume these people know they have an edge case and would take steps to either only run the browser on an intranet or private network or, for developers, only run it on one machine on a local server and not connected to the wider web. In the end I feel for you and I understand it sucks but really there's not much reason at all for anyone not in that situation to be outraged or care much that a version of FF so out of date is being auto updated without permission. And I say that in the nicest way possible.