Firefox is open source. Outdated open source is dangerous (even more than outadred closed source IMO) because people can literally look at the code and find every single bug. Even if they use security updates to roll out features or antifeatures, there are also security patches. And once those are out, now the entire world knows about the bug (because they can see the source changes). If you stay out of date, you are exposed. That simple
Also, updates to open source projects document the exploit being fixed and may even have automated tests written for it. You could literally just piece the tests together into an exploit.
Firefox is open source. Outdated open source is dangerous (even more than outadred closed source IMO) because people can literally look at the code and find every single bug. Even if they use security updates to roll out features or antifeatures, there are also security patches. And once those are out, now the entire world knows about the bug (because they can see the source changes). If you stay out of date, you are exposed. That simple
Also, updates to open source projects document the exploit being fixed and may even have automated tests written for it. You could literally just piece the tests together into an exploit.