Recently I installed one of the “flat icon” sets for LibreOffice which suits my tastes nicely. I also use the Alternative dialog Find & Replace extension and have its icon on my toolbar:
It makes an uneasy partner (shall we say!) in this context. I have tried to find out how to change the icon of an extension, but the “Alternative Searching” toolbar does not show up in the
Tools > Customise... menu, nor does the
Tools > Extension Manager... give access to this kind of modification.
I have seen a previous answer to a question about the location of toolbar icons, but this seems not to cover extensions.
Any help out there? I live in hope!
UPDATE: Result after help (see accepted answer, plus comments, below):