Almost perfect

Much better than Better search replace: I easily performed hundreds substitutions safely thanks to the regular expressions and informative dry run option which shows me every replacement I’m going to do if I confirm.

It’s worth nothing that the plugin uses PCRE regexp but doesn’t seem to support the quantifier {} in any format (no {3} or {3,3} or anything). See the manual for valid delimiters: personally I use the comma as in sed, to avoid going crazy with the slashes in URLs: an example valid regex is ,href=["']https://www.wikilovesmonuments.it/([^"'0-9]+/?)["'],.