This is exactly what I am looking for! Simple and effective. Great work!

This is excellent for blocking ad content and redirects. The often recommended "block site" add-on will still navigate away and show you a page saying the URL is blocked. This add-on keeps you on your intended page and makes unwanted content just never load.

Awesome! It just works as expected: simple and effective. I highly recommend it.

Works well, all it needs is a toolbar button or some way to toggle on and off without disabling the extension.

Fantastic, exactly what I needed to complete built-in Firefox ETP in strict mode.
Using "Lightbeam 3.0" I can see which domains can still follow me and then ask to "Request Blocker" to block them.
Also I've checked under 'about:performance' and it only takes 439 Ko ! Awesome.
Thanks !

Couldn't make it work with specific port, but otherwise works great.

THIS IS IT. thank you!

Works exactly as it supposed to. Simple and fast request blocking. Thank you!

Finally! On profiles without admin (access to etc/hosts) I can now login to different account on YouTube and on Google by blocking *://accounts.youtube.com/* (plus few extra steps).

This is truly deserve top rate it been about two years suffering & looking for extension like this, where have you been broooooo well done effective and simple with best options what do we need more than that thumbs up specially for "states" page counter with automatically sorted for triggered pattern not mention the auto filter while typing keep up the great work..

ごちゃごちゃしていないし設定等わかりやすくてとてもいいです。
最近のポップアップ広告や詐欺ページなどはアドレスが変化してしまうので
URLやドメインで指定しても対応しきれないことがあります。
昔Donut系ブラウザに装備されていたページタイトルまたはタイトルに含まれる文字を指定して
ポップアップ等の抑止ができないかなと思いました。

Simple, effective