Hello 4Lynn4, we're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash. #Enter ''about:crashes'' in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below. #Copy the '''5''' most recent Report IDs that start with '''bp-''' and then go back to your forum question and paste that into the "Post a Reply" box. (Please don't take a screenshot of your crashes, just copy and paste the ID's. The below image is just an example of what your Firefox screen should look like) [[Image:aboutcrashesFx29|width=520]] <br><br> Thank you for your help! More information and further troubleshooting steps can be found in the [[Firefox crashes - Troubleshoot, prevent and get help fixing crashes]] article. '''Also to answer your question''' : the system requirements for 10.10 are almost the same as 10.9, but for fully support see the next bug.... ''We'll have new hardware to support this platform arriving early in 2015.'' [https://bugzilla.mozilla.org/show_bug.cgi?id=1079468 Bug 1079468]- [tracking][10.10] Continuous integration testing on OS X 10.10 Yosemite {please do not comment in bug reports, there are for developers} thank you