If you go to the toolbar and click tools, there will be a dropdown menu. On that menu there's an option to clear the history.
Click on that and then on "Details" in the box that comes up. You can check off which things you want to get rid of and select a time period.
You can get rid of everything from the beginning of time, or just cookies from the last hour. Pretty much everything in between.
Everything but temp files.
For temp files, I always go through windows. Go to "My Computer".
Right click on your hard drive. Select "properties" from that menu.
Hit the button marked "disk cleanup". That will search the hard drive and find all the temp files.
Widows does strange things with temp files sometimes. This method is the most effective way to get rid of them, for most people. Using a browser app to get rid of them may leave duplicates on the hard drive.
There are special tools for us geeky types that would keep Mosad from being able to find and restore these files but few people really need those.
Of course if you'd stop surfing the porn sites, you wouldn't need these things.
SOME PEOPLE ARE LIKE SLINKIES; NOT REALLY GOOD FOR ANYTHING BUT THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS.