User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:100.0) Gecko/20100101 Firefox/100.0
Firefox for Android

Steps to reproduce:

Dear I found a problem with a javascript code in the last update, which does not allow me to write in the inputs of my website, I want to clarify that in previous versions it worked.

Please excuse me for my bad English, I'm from Argentina, sorry.

Actual results:

I pass you the javascript code, although it is a function so that the selection is not allowed, I understand that it should be verified since in other browsers such as edge and chrome it works.

Please excuse me for my bad English, I'm from Argentina, sorry.

Expected results:

In firefox it works but it does not allow you to write in the inputs.
I tried firefox for android and the same thing happens as on the pc.

Please excuse me for my bad English, I'm from Argentina, sorry.

It seems window.sidebar doesn't exist in other browsers, and JS is behaving differently than in other browsers. You should remove the if (window.sidebar) { condition and everything that's inside, so:

<script type="text/javascript">

   function disableselect(e) {
       return false
   }
   function reEnable() {
       return true
   }
   document.onselectstart = new Function("return false")
</script>

Great thank you very much for your time I did not know about this, thank you