Try one of these:

• Fox Splitter: https://addons.mozilla.org/firefox/addon/fox-splitter/
• Split Pannel: https://addons.mozilla.org/firefox/addon/split-pannel

This did not answer the question.

Need a version of fox splitter compatable with firefox 6.02 .

When will one be available ?

Going back to ver 3.6 for this reason.

Thanks

Fox Splitter is compatible with Firefox 6.

Works with: Firefox 3.6 - 7.*

If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is an update.

paulandreasen if you go to Addon pages and look down the page to where is says Version Information and click on that you will see what versions they are marked compatible with.

Ok I see the problem, you are using a rather old version from https://addons.mozilla.org/en-US/firefox/addon/fox-splitter-formerly-split-br/ where it says Works with Firefox 3.0 - 3.7a1pre

The author Piro has the new version at https://addons.mozilla.org/en-US/firefox/addon/fox-splitter/

Version Information
Version 2.0.2011090101 August 31, 2011 
Works with: Firefox 3.6 - 7.*