CCleaner already detects the following in SeaMonkey:
Internet History = history.dat
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This will only clean the SeaMonkey Cache for the default profile (edit it if you wish to clean a profile name you've created), and it will be listed under Firefox/Mozilla (only tested on Windows XP):
[Mozilla SeaMonkey Cache]LangSecRef=3026Detect=HKCU\Software\mozilla.org\SeaMonkeyDefault=FalseFileKey1=%userprofile%\Local Settings\Application Data\Mozilla\Profiles\default\Cache|*.*
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This will only clean the SeaMonkey Cookies for the default profile (edit it if you wish to clean a profile name you've created), and it will be listed under Firefox/Mozilla (only tested on Windows XP):
Note: In order to clean SeaMonkey cookies you will have to manually input the random folder named created by the installer which the cookies.txt file is located in, this folder is named ?????.slt in the example below. This is an entry that you must complete yourself:
[Mozilla SeaMonkey Cookies]LangSecRef=3026Detect=HKCU\Software\mozilla.org\SeaMonkeyDefault=FalseFileKey1=%appdata%\Mozilla\Profiles\default\?????.slt|cookies.txt
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That's all! You'll now have to wait for official cleaning support to be added by the CCleaner developer Mr.G, because it's gonna take some of the built-in detection/routine he uses to figure out random profile names, and to be able to find them without using a specific path!
I had forgotten how ancient the original Mozilla Suite looked when compared to Firefox, what a shocking reminder, and SeaMonkey looks just the same. I only wish they'd make Composer a separate application because I've always liked it, other than that SeaMonkey is off my computer forever.