I have tried every browser I have found as a free download. Always ended up coming back to firefox. I have found that if you download more than 4 or 5 Add-ons, it starts acting up. Stick to only the add-ons you really need and it is fantastic. One add-on I think everybody should have is "Lazarus" text recovery.
I've switched from Safari to Firefox. Personally, I think it's a lot more reliable than Safari. I've tried downloading Chrome but apparently it's not compatible with my Mac.