Well, you could, with a bit of dom manipulation JS snippet in the Free Nodelet, set the autocomplete attribute of the entry box to 'off': 

document.childNodes[0].childNodes[2].childNodes[3].contentDocument.get
+ElementById('talkbox').autocomplete = 'off';

[download]

This is just for chatterbox sidebar. For other instances of a chatterbox entry box, e.g FullPage Chat, the path to the element may be different. Welcome to the hell of DOM and JavaScript.

For instance, the code to disable autocompletion in the Chatterbox Nodelet of any page, the code is much shorter:

document.getElementById('talkbox').autocomplete = 'off';

[download]

Tested with Firefox 45.6.0 on debian 8.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In reply to Re: CB sidebar auto-expansion problem by shmem
in thread CB sidebar auto-expansion problem by LanX

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