Double-click on a page causes Firefox to jump back a page instead of highlighting at the insertion point

Question

I have a Logitech iFeel MouseMan. The side button is set up for double-click. Sometimes instead of highlighting at the cursor position the tab jumps back one page. (That is, it acts as if I had clicked the back button at the left of the address bar.) This anomalous behavior does not happen if I physically double-click with the mouse's left button. This anomaly happened about a year ago and a Google search turned up a Firefox configuration setting that fixed the problem. Now I can't find that setting and a Google search provides no answers. I solved the problem by resetting my computer to an earlier reset point, but that is an inelegant solution -- and it takes hours. (The problem is not happening now. I ask for the future.) I would prefer to make the problem go away by changing the appropriate Firefox setting. Logitech told me that the problem is not with the mouse nor its software, but with Firefox and that I should ask Firefox experts.

Answer 1

Thanks for your response.
I guess I didn't revert to as far back as the change I had made because when I follow your instructions, no entries are bold.
Or did you perhaps mean the next time the problem occurs I should look for a bold entry? And then change it back to what it was? (All that I recall from a year ago was that I changed one entry from ''true'' to ''false'', or vice versa.)