performance issues

Please Could you specify which browser is the best for FTO please.? I just created new project and added indicators and custom indicator and custom ea. It worked great with no issues. When I logged next day its log in but every move last forever till is completely unresponsive. it is not first time as I reported similar issues before. It cant be any issues with too many indicators etc as its worked great before. Even just now I refreshed 4 time this project because after log in whatever I did it gets unresponsive so I decided to send this message and I refreshed once again and it working smooth again and I haven’t changed anything. I know you guys doing your best but it makes me sad as I cant use the software. I know clearing cache , cookies , log out and log in etc sometimes work but I havent done anything but refresh only and its start working again. But sometimes I do it 10 times and still does not. I really dont know why is that

Also I got another project which I was able to run but in safe mode but when after log in in normal mode its gone again. What is safe mode supposed to do and how to use it exactly?

Thank you I hope you can find some solution