Internet Explorer

Internet Explorer 8

Click "Tools".

Once your browser is open, click the Tools menu. Or, optionally you may simply press Ctrl-Shift-Delete to open the Delete Browsing History window (and skip step 2)

Delete Browsing History...

Click on Delete Browsing History...

"Temporary Internet Files".

Select "Temporary Internet Files".

Click the Delete button near the bottom of the window to delete your temporary files (i.e. clear your cache).

If you want the browser to automatically clear the cache whenever you close it, click the Advanced tab. Click to check the box next to the "Empty Temporary Internet Files folder when browser is closed" option (in the section labeled "Security"). Click OK. This will delete everything except cookies.

Firefox
Firefox 3.5

"Tools".

After the browser opens, click on "Tools".

Clear Recent History...

Now click on Clear Recent History. Alternatively, you can access this menu directly by pressing Ctrl+Shift+Delete.

Time range to clear

Everything

Now, beside "Time range to clear", click "Everything".

Details

Cache.

Click on Details and select only Cache.

Select Clear Now.

Firefox 1.5 / 2.0 / 3.0

Below is the full method, although it is possible to simply go to Tools, and select Clear Private Data, or to just press Ctrl+Shift+Delete. Please note that these options clear what you have set the browser to clear in Tools > Options... > Privacy, which can mean the cache, although it may also include passwords, and search and browsing history, so be careful.

Go to Tools and select Options... (Edit then Preferences... on Linux).

Go to the Privacy tab, and click Settings... (in the blue box in the image).

Select what you would like to have cleared.

Return to the Options menu. If you want your cache cleared automatically, every time you close the browser, click the appropriate checkbox (shown in red in an earlier image).

Press "Clear Now" under the Settings button.

Firefox 1.0

Once your browser is open:

Click the Tools menu and select Options... (Edit then Preferences... on Linux).

Click the Privacy button and select the Cache tab.

Click the Clear Cache Now button.

Mozilla SeaMonkey

Once your browser is open, click the Edit menu and select Preferences.

In the left-side list, open the Advanced node and select Cache.

Click the Clear Cache button.

Google Chrome

Tools menu.

Once your browser is open, select the tools menu. (the spanner(UK) / wrench(US) in the upper-right corner) and select Options.

Clear Browsing Data

Select Clear Browsing data... under the "Under the Hood" tab.

Clear cache

Select the Empty the cache checkbox.

If you do not wish to delete cookies, etc., remove checks from them in the list.

Select your time period.

Select the period of time for which you wish to delete cached information using the Clear data from this period: dropdown menu. (If in doubt select Everything).

Done!

Click the Clear Browsing Data button.

Opera

Once your browser is open, select the tools menu and click delete private data.

Click the details button.

If you do not wish to delete cookies, saved passwords, etc., remove checks from them in the list.

Press delete.

If you are using the Nintendo DSi browser, go to History (accessible from the start page (press start button) & extended toolbar) and touch Delete All.

Then go to the start page again and touch Settings.

Then scroll down until you find Delete Cookies and touch that.

Konqueror

Once your browser is open, click the Settings menu and select Configure Konqueror.

Scroll down in the list of images and select Cache.

Click Clear Cache.

Safari for Mac OSX

Once your browser is open, click the Safari menu and select Empty Cache....

Click Empty.

Safari for Windows

Once your browser is open, click the Edit menu and select Empty Cache....

Click Empty.