An annoying thing mostly, but occasionally results in data loss. It happens when I am typing - as I am now - in a browser window in Firefox on my MacBook Pro (2016, Mojave 10.14.6).
When I'm typing on a SE site, I get a warning, asking for confirmation that I want to leave the page:
This is the same warning you'll get if you hit the "Back" button in Firefox after typing in a form that you've not yet posted. If I get the warning, obviously I select
Stay on Page, and return to my work. But sometimes, I don't get the warning (or it happens in a flash); this is when I lose my data. The tab I'm typing in 'backs up' to the previous page instantly. When I go forward, the work/data I've entered is gone.
I've checked my touchpad settings & find nothing other than
Swipe between pages that seems suspect. I disabled
Swipe between pages over a year ago with no apparent effect.
Firefox also has some built-in shortcuts, but they don't look like suspects either:
I'm not a touch typist. The heels of my hands rest on either side of the touchpad while typing. I don't believe I am accidentally typing
command + ←.
What is causing this? More importantly, how do I stop it? Is there any way to recover the data, or is it truly "lost"?