What is the site your submitting forms at? This would also help those looking to know as well.

WestEnd said

What is the site your submitting forms at? This would also help those looking to know as well.

This is not relevant. Every form with an input box is affected by this bug. Please look into the link pointing to bugzilla.

Hi,

The people who answer questions here, for the most part, are other Firefox users volunteering their time (like me), not Mozilla employees or Firefox developers.

If you want to leave feedback for Firefox developers, you can go to the Firefox Help menu and select Submit Feedback... or use this link. Your feedback gets collected by a team of people who read it and gather data about the most common issues.

As WestEnd said, we need more information to help you. What website? How are you submitting U+00A0 ? Is this with many websites, some, a few?

I used the "Submit Feedback..." menu and was redirected to all kind of FAQs until I found a button to finally write a question which you can read here.

You link sends me to I site where I can submit if I were happy or unhappy about Firefox. That seems stupid. I do not have any feelings about a Software. I just want to make it better by submitting Bugs.

But okay. When Mozilla does not care about their own bugtracker and this support forum is only filled with volunteers not working for Mozilla, then where can I really get in contact with them?

FredMcD said

As WestEnd said, we need more information to help you. What website? How are you submitting U+00A0 ? Is this with many websites, some, a few?

The issue is on every website because the bug does not depend on the website but on the browser, in this case Firefox. It is enough to create a simple HTML site with a form and copy/paste some text with non-breaking spaces into it. When trying to copy the text back all the non-breaking spaces are gone. Even in this reply text box non-breaking spaces are removed.

Simple example: Open MS Word or LO Writer, write some words and use non-breaking spaces instead of normal spaces. This should work with CTRL+SHIFT+Space. Copy that text, paste it in here or every other website you know about. Then copy that text again and paste it into Word/Writer. The non-breaking spaces are gone.

Also the bug report mentioned in my initial post is enough and shows the whole issue and even the solution. I don't know why I need to explain it again. Did you follow the link? If you do you should not have any more questions because it's all there.

Does this help? https://bugzilla.mozilla.org/show_bug.cgi?id=359303#c57

FredMcD said

Does this help? https://bugzilla.mozilla.org/show_bug.cgi?id=359303#c57

That is exactly the patch I linked in my initial post. So yes, it should fix the bug. but because I am not able to compile Firefox by myself I was not able to test it. But I trust in the author of that patch.