Please see the file attached below

This issue is identified and fixed, but I'm not sure when you will see this.

• bug 1221484 - One letter is missing on the starting page

Please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html

You can open the about:home in a tab and open the Web Console (Firefox menu button or Tools > Web Developer). Paste or type this code in the command line: gSnippetsMap.clear() Press the Enter key to run the code.

• https://developer.mozilla.org/Tools/Web_Console

Thank you.

I would like to know if it was error (in polish sentence "śledzniem"=not correct , instead "śledzeniem"=correct) caused by Mozilla or somebody has control over my computer.

However actually home page seems to be correct.

This was a problem with that specific snippet that Firefox shows on the about:home page. These snippets are downloaded from the Mozilla server and they have fixed this on their end.