Extensions have conflicting keyboard shortcuts
The Ctrl Shift S function is used by both the extensions, in NoScript's case to provide a list of scripts that are allowed/blocked, and in AdBlock Plus' case to select an element to hide. At present, NoScript has dominance so when Ctrl Shift S is used, the list of scripts opens.
How do I change it so that AdBlock Plus has dominance?
Opaite Mbohovái (1)
Time to dump an extension, yes/no, noscript?
You can resolve such problems with the "keyconfig" extension, see the the blurb on my site with links to the extension and help. The extension is not at add-ons.
Not all duplicate keyboard shortcuts interfere with each other, but that is somewhat the exception.
To find duplicates sort on the shortcut and look for all the navy blue selections.