Sometimes I deeply hate the Opera browser, as with its RAM consumption behavior, but most of the times I just love it.
One of the reasons I do is because it allows me to pretty easily tweak my browsing safety.
There are several aspects to browsing safety. When working on your own computer the most important one after having an updated browser is JavaScript.
JavaScript is really useful, as it allows you to make websites interactive, but it can be easily misused to do all kinds of bad stuff, from personal tracking to attacking IRC networks, passing through personal information stealing, cross-site scripting, clickjacking, etc., even if you use Linux, Mac OS or any other non-Windows operating system. Although not strictly necessary, most of the new browser-related attack vectors require JavaScript to work or be useful.