Let's share information about helpful add-ons we use -- no, not privacy, ad-blocking, security extensions. Rather, share information about add-ons you've found useful, perhaps even indispensable for your purposes. I'll start with a couple. Lazarus: Form Recovery
-- Have you ever run into a sudden crash, forum glitch or some other event that resulted in losing your post or comment? Lazarus to the rescue! Just return to forum/website where the loss occurred, right-click and select "recover text".
Here's a new one, fresh out of the box: Norwell
would have saved me a lot of time not long ago when I was trying to locate the URL of a site I had visited within the previous few days. There is a search box, columns can be sorted by column headings or click on the View drop-down and select the sort option you need.
Norwell can be downloaded from the link above or the .xpi can be downloaded from http://www.freedomlist.com/files/norvel (at) history.xpi
(replace the spaces and (at) with the @ symbol). To install the .xpi, open the folder where you downloaded the .xpi file and drag it to a Firefox/PaleMoon window to get the permission to install prompt.