Go to about:memory then click the "Minimize memory usage" button.
P.S. If anyone knows how to add that button to the FF toolbar, I would consider you a minor deity for at least a whole day.
Re:Firefox 23 is available
by MikeCapone on Tuesday August 06, 2013 @11:45AM
(#6167226)
Interesting. What does pressing that button actually do?
Re:Firefox 23 is available
by lambda_cube on Tuesday August 06, 2013 @12:08PM
(#6167371)
If you hover that button with your mouse pointer you can read the following explanation:
Send three "heap-minimize" notifications in a row. Each notification triggers a global garbage collection followed by a cycle collection, and causes the process to reduce memory usage in other ways, e.g. by flushing various caches.
Its still my favorite browser though.