I've recently installed the latest version of Firefox, and I'm gonna play the advocate of the devil: I actually like the design.
First, let's download it from the official web page
Then, let's extract this tarball into /usr/local
$ sudo mv ~/Downloads/firefox*.tar.bz2 /usr/local $ cd /usr/local $ sudo tar xvf firefox*.tar.bz2 $ sudo rm firefox*.tar.bz2
Finally, link the "firefox" binary to your binary folder.
$ sudo ln -s /usr/local/firefox/firefox /usr/bin
And now you can open Firefox and start configuring it
$ firefox
First, let's go on the preferences page: about:preferences
Those are my settings:
Now, let's install some add-ons. I only have two of them. One for uBlock Origin, which is an absolute must-have to me. And one called Violent Monkey for user scripts (my password generator/manager is a userscript).
All those things are open-source.
First, I want to unlock a style of toolbar that is now disabled by default. So go into about:config.
Click on "Accept the risk and continue". Then search for "compact", set the first result to "true".
Once you did that, right click anywhere in an empty space of the toolbar and click on "Customize". Here I simply changed the theme to dark, the desity to compact and I removed all the useless things from the toolbar (like empty spaces, pocket, firefox account, etc).
And here you are, that is my privacy and security focused config of Firefox 89. It's nothing fancy but it works well and the design is pretty good.