Thanks. i looked through the extensions on that page yesterday, and didn't find what I wanted. For example, I see an extension to update uBlock, but I didn't see uBlock itself. So, I used one of the older versions of uBlock on Mozilla's pages showing previous versions at https://addons.mozilla.org/en-US/firefo ... ns/?page=2
I installed version 1.13.8, since it shows that the newer 1.14.0 and 1.13.10 are not compatible with this browser (when viewing the versions page using Pale Moon 27.9.4). Other extensions that I use like PrefBar were also not listed on the Pale Moon extensions list page. So, I got them from the Mozilla pages for extensions. The versions that do not say they're incompatible are working fine so far.
Ironically, Pale Moon was more compatible when compared to newer versions of Firefox with PrefBar, as the latest version of it is not compatible with Firefox Quantum (it will not work with Firefox version 57 or newer, according to the author) See note on the Mozilla page for it here:
https://addons.mozilla.org/en-US/firefo ... src=search
Anyway, so far, so good. Pale Moon is working much better than other browsers I tried on this Dell Inspiron 11 with its 2GB of RAM. Times change, where you tend to need more and more memory to support newer versions of operating systems and applications, and 2GB is a bit lacking now. ;-)