Nice to hear you answer, thanks!

- I'm located in Switzerland.

- Search example that failed are numerous, I added one to my original post.

- while that setting did indeed do the trick, I contest your default setting. I delete my cookies quite frequently, which will kill those settings. I see that you're trying something good with that feature (preserve my query string from reaching the target site). In this case, your implementation is just not good enough. You should not mess up my browser history in any case. Can't you do this differently?