I love having the Regex search in Fire (really missed it when I was using Water). Is there a way to use regex back-references for captured groups in the replace? I tried \1 and $1 but it inserted the literal characters.
Not at this stage, no. RegEx only applies to there search term, and it’d be a major undertaking to do more, so it’s not on my immediate (or even medium-term) list — but I’ll log an issue.