Firefox tends to crash upon opening more than 4 tabs or opening a new window.
I thought the crashes might have been due to the uBlock origin and Facebook container extensions using up too much memory. However, Firefox continued to experience crashes after I tested it in safe mode. When I open up Task Manager, Firefox seems to be using up a lot more CPU resources and memory than it did before a couple of days ago. I've since uninstalled my extensions but the problems still persist.
The report ID's for the crashes are: bp-94cefb01-7fa6-4b62-93bb-c14c50210320 bp-eaf60c05-af53-47f8-8bfd-b06060210320 bp-22306d71-0eed-4134-95be-b176d0210320 bp-79f8c944-27e3-41a7-bee0-1aca40210320 bp-91728ef4-3206-45d3-8c3d-2ebd00210320 bp-0f95dfcf-5e07-4a8a-b77a-ecb580210320
The crash reports are OOM (out of memory) reports where not enough contiguous free memory is available.
Maybe try to run as less programs at the same time and especially when you run Firefox close programs you do not need.
You can check the Firefox Task Manager (about:performance) and about:memory pages.