3/5 stars for the time being, I'll change it if the issue is addressed, the add-on is great but there's a flaw which makes it very annoying to use. the problem is "hide who to follow" force hides searching for people. (e.g. type "twitter" in the search box, click on the people section to only show accounts, the add-on then force hides everything on the page that is an account, but because of that it seems to create an infinite loop of search for accounts and hide accounts which makes the page reload constantly)
Edit: to clarify, i dont want the add-on to hide accounts in the people section of search, its counter productive to deliberately search for a specific account and the add-on hiding search results.

Did what it said it was gonna do. 5/5 Stars.

/*
The new Twitter interface (circa 2019) uses auto-generated markup
with obfuscated class names which are not guaranteed to be stable over time.
In order to remove unwanted parts of the UI when they appear,
we use CSS selectors in the stylesheet (content.css) to identify
areas of interest, then apply a short fake animation to them.
Here in JavaScript, we listen for all `animationstart` events, check if they match
one of the areas of interest (`AnimationEvent.target` points to the element matched
by the CSS seletor), then mark the target element or one of its ancestors. This marker
then causes a CSS selector from content.css to match and hide the intended element.
This is a convoluted but viable workaround for missing ancestor selectors in CSS.
*/

I used to use Stylus/Stylish filter to achieve my intentions, which are closely the same as what this addon does. However, since the major change introduced in this spring, my solution no longer works. I looked for a working addon to get the same result, but there seemed to be none.

Then, a few months later, I finally found this addon. This method (quoted above as comment) is brilliant!

https://github.com/oslego/better-twitter/issues/12

Better Twitter Had blocked recommendations for Who To Follow. As of today 7/25/2020 Now have on R side "Relevant people" showing instead... No way to block. How do I block this now ? DRIVES ME CRAZY> Hope update to address coming soon. I am running latest versions of FireFox, Twitter and Better Twitter
7/26/20 Update: Deleted and Re-installed , as soon as you click on a Twitter entry to read it more. up pops "Relevant people" to follow again... with no way to remove it or close it out w/o restarting Twitter... FRUSTRATING

It does what it says. I love it. Razvan, awesome work.

Good extension to hide all the bullshit that doesnt add to anything. One thing though, is there any way to move the "X" to close a picture to the right side? It's probably the thing I hate most about Twitter. I have no idea who thought that having the close button on the left side contrary to 99.9% of programs.

I downloaded this to block out the "trends for you" section, and it did it automatically without any problems. Very impressed!

works with the exception of hide ''trends of you'', which is essential for me to be permanently rid off.

It doesn't hide "Who to follow" from the profile page, which is essential for me to be permanently rid off.

Thank you for the extension.

I still get "Who to follow" on my own profile page, and I think I've seen "Topics" pop up a few times.

Perfect solution to eliminate the BS. Just what I wanted in CSS edits in one easy add-on.

Worked like a charm and now I don't have to fall down the rabbit hole of twitter nonsense everytime I go on to share something or reply to actual notifications. Thank you very much for doing this!

Can you make same thing with setting for facebook? :)

Brilliant. Thank you so so much. "Trends for You" was utterly depressing. You have helped make my Twitter experience more enjoyable.

Does not work on the new Twitter interface. Too bad, it was nice. The new interface is absolutely disgusting and I don't know if there will be an extention to give us back the previous interface.

EDIT : No fame and No Vanity work. Promoted tweets, Trends, Who To follow, cannot be hidden. Sad.

works for who to follow, and footer.... don't see any promoted tweets, so assume it works on those too.

the rest i don't care about.

Used to work but has since stopped. :( It helped improve my Twitter experience. I miss it.

Works perfectly, JUST remember to set twitter's language to English