I think that's nsGNOMEShellSearchProvider, it shouldn't interfere with the address bar, it uses its own search capabilities.
Bug 2010882 Comment 24 Edit History
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I think that's nsGNOMEShellSearchProvider, it shouldn't interfere with the address bar, it uses its own search capabilities. plus when you tested in troubleshoot mode, that disables all the add-on temporarily.
I think that's nsGNOMEShellSearchProvider, it shouldn't interfere with the address bar, it uses its own search capabilities. plus when you tested in troubleshoot mode, that disables all the add-on temporarily. I think mozregression, as suggested in comment 21, is the best bet to figure out something here.