With Firefox 57 a lot of legacy extensions stopped working (see the list Discontinued Legacy Addons for Firefox ).
This is a list of all my favorite applications that I have used and thoroughly tested, in as many workflow / methods I could possibly imagine.
Bring your own ideas to life as this list is going to include the name of every simple game engine that allows you to create games that may or may not need to write a single line of code!!!
Get away from Google with this list off services and software`s
Programs that help you manage or take your notes with a preference for wiki and open-source note-taking applications.
This is a list of Alternative and Open Source Android Apps and OS I could recommend because I use most of them since November 2013 under Paranoid Android with a Nexus 5. Most of these apps are available via F-Droid.
Electron makes it easy to build cross-platform desktop apps with web technologies, so easy it's been used to power some hugely popular apps. Check out this list of them.
This is a list of reliable image hosts with a good track record and more than a few years under the belt. All image hosts on this list support hotlinking.
Privacy-enhancing software I trust / recommend. Browsers and their extensions, email providers, VPN services, note-taking apps, passwords managers, backup, sync and encryption software - to name just a few.