I have preferred Kissasian before, but my antivirus software keeps warning me about the site trying to load unsafe content. 

I've had the same problem with dramacool too.

What other free sites do you guys use, where you have not had this problem?

Prefer apps if u want to play safe

Please tell me an app!

Have you tried the free content at (Rakuten) Viki?
BiliBili might prove fruitful (like YouTube, an adblocker is essential for this one).

Dramacool isn't safe

For those using such sites: what safety measures do you use? E.g. what anti virus software, what ad blockers? What browser?

 Journalist:

For those using such sites: what safety measures do you use? E.g. what anti virus software, what ad blockers? What browser?

Use the Brave webbrowser. It has like a red lion as its icon and e.g. on YouTube or other webpages it blocks all ads or pop-ups/secondary websites for me... As for watching dramas, I highly recommend Rakuten Viki too

Thank you. I am using the Brave browser, sometimes I think it's a lot slower than e.g. Safari. It seems unable to handle multiple tabs, is that just me using it wrong? (I usually have many tabs open on my regularly used browser) 

You're welcome! If you're already using it, I'm not sure what might be working wrong because I also leave it open with multiple tabs and it seems fine to me. Try going to "Settings" -> "System/Performance" -> "Memory Saver" and activate "Maximum/Agressive" (not sure what it's called in English). Tabs you're currently not using will be freezed and the browser won't be as slow hopefully