Alternative browser to Safari

Hi,

I have a MacBook Pro (13-inch, Early 2011), which runs MacOS High Sierra 10.13.6 and Safari 13.1.2.

It is not possible update the system any more.

Until a couple of month ago, I was able to access almost everything with Safari.

Then I started to have issues, for example with my bank website and even with Youtube.

So I was forced to look for an alternative browser.

I tried Avast Secure Browser, but I found it a bit too intrusive.

Then I tried Google Chrome, but it was too heavy for my system, which kept on freezing.

At tthe end I decided to ask the community.

Sure of your help i thank you in advance