Regarding the curly brackets and the regex search: I have the same situation here. Maybe someone in this thread can show (with pictures?!) how these brackets can be enabled in Firefox. Also how the regex search “should” work.. in the dev tools

I do solve the puzzles by connecting not all 2-pairs in a line. I connect two 2-pairs in one line, then two 2-pairs in the next line and the next two 2-pairs in 3rd line and so on. I do repeat this over all lines and then start again until I have to connect bigger pieces. This worked all the time.

@Raas-Algul: No. This thread is definitely not to post a puzzle and retrieve the final coordinates. I just guess that the answers with coordinates came from people with to much time.

@Tritop99: Microsoft Power Automate Desktop can be worth a try but it would be a poor solution. The best solution would be to hijack the java code.