In order to properly tag intermittent failures for .xul files which are going to be renamed to .xhtml, we'd like to change the summary of the bugs as per https://bugzilla.mozilla.org/show_bug.cgi?id=1543834#c4.
There are 134 bugs matching "intermittent .xul", but many of them haven't been updated in years. So as a starting point, I'd like to close the inactive bugs
Here's the search I have so far (which ignores bugs with whiteboard text since they often indicate to not close a bug): https://mzl.la/2UZrFmQ. It should be further filtered to include only bugs that haven't been updated in the last year or so.
Once we close these then we can figure out how to best rename the remaining bugs to include both file names.