NS blocking identification on LeBonCoin french site in Firefox ESR 128?

[user0022]

Hello! I am under Lubuntu 22.04 OS, and NoScript seems to cause a problem in Firefox ESR 128.

The problem.

As a french user, I am registered on Leboncoin.fr, which is the main french classifieds site (a french eBay one could say). I don't remember very well, but I think that maybe 2 or 3 years, or a few months ago, I could log on this site normally. "Today", after long time not using it, I saw I couldn't. A LBC page shows a warning saying "Please enable JS and disable any ad blocker". So I allow temporarily 1 or 2 scripts in NoScript, and this warning disappears. So I click on "Se connecter" (means "Connexion"), but then site tells me things like "you have been blocked". It can tell it right away, or after having given me a CAPTCHA...

My small tests and understanding.

So I have done several small tests (as I have a low computing level).

• I allowed temporarily every script on this site (NS shows me e.g. 2 scripts, I allow them, page reloads, 8 new scripts to allow, page reloads, 3 new scripts to allow, page reloads, no more scripts shown to allow). But then the problem remains.
• I disabled NoScript itself: and then I could login (which I find strange considering it didn't work with the first action that I would have thought to be equivalent).
• I also had first (before finding NS also causes the same blocking) disabled an about:config setting, privacy.resistFingerprinting was on true (I must have put it on true a certain time ago to try to make FF more secure but I don't remember well the circumstances), so I put it back to its defaut position that is on false, then, passing from true to false fixed the login issue, and as it was with all addons disabled, I concluded that this only setting could make the problem happen. Like it is warmed in fact in about:preferences#privacy when put to true:

You're using Resist Fingerprinting (RFP), which replaces some of Firefox's fingerprinting protection settings. This might cause some sites to break

• I also had tried to empty all history or cache, but it didn't change anything.
• I also have a Firefox 129 Snap version, where the problem doesn't occur. I didn't check many details, but there I saw a difference, that is that on a LBC page, NS shows only 1 script, (...leboncoin.fr, the only one that I have to allow in the Snap FF to make login work), while in FF ESR, NS shows 2 scripts (...leboncoin.fr and ...aticdn.net).
• I could have tried to reinstall NS to have a brand new one, but I didn't even try as my previous addon reinstalls showed me they came back in the same state, settings, etc, where kept.

I also have 1 or 2 other privacy/security addons, uBlock Origin and LocalCDN in ESR, they don't seem to cause a problem, uBO can be used to replace NS I've heard, but I did'nt find yet how to achieve this. (On Snap version, I have uBO with different lists and 2 or 3 different privacy/security addons.) I put the settings in about:preferences#privacy at rather high choice too.

Conclusion for what I will do to use this site though.

So what I see for now, is that the simple fact to have NS enabled (even allowing every script of the site where there is a problem) prevents me from login on LBC in ESR. (And it possibly blocks things on other sites I jsut didn't come across I imagine.) I feel that I am maybe a very rare case, and the problem could be there because I have inherited of certain ancient NS settings or features, that could come from years ago, as I have migrated my /home directory between 2 or more OS, an ancient one being even in 32 bits.

My personnal choice could be simply to use the Snap FF, but my current session, with all the tabs I am interested in, is in the ESR, and I don't have enough RAM to open these 2 browsers at the same time. But yet maybe I will, use the Snap FF. I don't really want either to migrate my ESR session to the Snap version. Or continue using the ESR, and disabling NS when I am on LBC, but I wouldn't really like it. I could hope a fix for this but I don't have a big hope it will happen. I could also try to learn how to use uBO like NS.

Thank you!...