I have changed the default setting in about:config to clipboard.autocopy value= false. I have restarted my system and selected text still saves to clipboard.  This issue does show up on this thread here https://bugzilla.mozilla.org/show_bug.cgi?id=854565. But it is checked as solved. Apologies if this question should have been posted there. I am using Linux Mint 17, Firefox 32.0.3

I have a custom firefox extension that grabs data from the clipboard, as well as selected text from the firefox document. Problem is, every time I select text, it overrides the clipboard data with selected text data. The clipboard always mirroring my text selection. I need to disable this. Or, ensure that selected text gets sent to primary clipboard, while firefox extension accesses clipboard. (I am assuming nsIClipboard pulls data from clipboard vs primary-clipboard). I am confident that selected text is being dumped into clipboard, and not into primary clipboard. Selected text always overrides whatever I copied using Ctrl + C command. Middle mouse click, or Ctrl + V output same thing. I have changed the default setting in about:config to clipboard.autocopy value= false. I have restarted my system and selected text still saves to clipboard. This issue does show up on this thread here https://bugzilla.mozilla.org/show_bug.cgi?id=854565. But it is checked as solved. Apologies if this question should have been posted there. I am using Linux Mint 17, Firefox 32.0.3 Any help greatly appreciated.