Why does closing all open windows (15) and leaving only one drop ram usage from 1.5 to 1.4Gb and not more.

Why does closing all open windows (15) and leaving only one drop ram usage by only 100mb from 1.5 to 1.4Gb.
What is in this 1.4 gb ?
I don't care much about ram, It's just that cpu usage spike like crazy by the end.
''Edited to remove swearing - TonyE''

Hi musicfan,<br />Sorry you are having problems with Firefox. Maybe you should have asked earlier and we could have fixed it.
Reading your comments I do not see that rolling back to an insecure Firefox 22 will actually help you much. You are probably best using IE, unless you have also damaged that.
*[[Export bookmarks to Internet Explorer]]
You should not use old versions they are insecure. Security fixes are publicised and exploitable.
* [[Install an older version of Firefox]]
* https://www.mozilla.org/security/known-vulnerabilities/firefox.html
Most others will not be having such problems. We are now able to say that with confidence because after developers missed a regression in Firefox 4 telemetry was introduced so that data was obtained. It may be an idea to turn on your telemetry, if you have not already done so, and decide to stick with Firefox.
*[[Send performance data to Mozilla to help improve Firefox]]
Trying safe mode takes seconds. Unfortunatly if you are not willing to do even rudimentary troubleshooting there is not anything we can do to help you.
*[[Troubleshoot Firefox issues using Safe Mode]]

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