You’d write www.example.com/*, but that would apply to everything then also /fr. If you need it explicitly only for the root directory and /en you’ll need two page rules.
because if I write www.example.com/* the rule will apply to all the elements in my website, right? I only want the rule to apply to a specific command (?et_fb=)
I’m trying to follow a tutorial ( How To Fix Cloudflare’s Rocket Loader Conflict With jQuery) but it’s complicated for me I’ll check with someone who knows better!
Thank you very much for your help Sandro, I’ll try your solution