I use this add-on to block Youtube as I started to notice it taking more and more time of my life. This is definitely helping with the addiction.

Excelente complemento. Muy eficiente en su modo de lograr su propósito. Estoy satisfecho con el cuidado. Gracias a los colaboradores por diseñar esta aplicación.

Best extension.

Guys, developers! You can’t even imagine how grateful I am to you! You help me live straight on! The fact is that I constantly went to the page in Vk to my ex-girlfriend, looked at the pictures and suffered and couldn’t forbid myself to do this. Now, I have added a link to her page and her first and last name and all this is blocked and I'm sober right. Plus, I blocked the extension itself with a password, which I just don’t know and that’s all. I can go to the Vk site everywhere, except for her profile. Block other sites - I do not need, and in the most important thing you really helped me! Sincere human thanks !!!

Helps increase your productivity.

Good for controlling yourself while studying.

Wiped out tabs, can't return to websites, website addresses are deleted.

I installed this with tabs open in the firefox browser. When I changed to the tabs, the contents would be replaced with an ad for Blocksite. When I hit the back button the contents would be replaced again.

When i disabled Blocksite from Manage Extensions, those all tabs were closed. Looking in history/recently closed tabs, i don't see my tab names, it only says 'blocksite', when I reopen those, the tabs are opened with a blank pages, (with an web address of moz-extension://1a433477-5e82-4f78-b348-a664e3101618/blocked.html) and the back button is grayed out.

Essentially, BlockSite causes me to loose the tabs I had open and deletes the webpage address.

For some reason I cant find the options to control blocksite, add/remove websites, or even see an icon at the top of firefox. The only thing i see is the Enable and Remove buttons in Add-ons (Ctrl+Shift+A). There is no Options button, (like I have for Adblock Pus), so I can't control the add-on or even block spyware data collection.

This is after installing blocksite from https://addons.mozilla.org, adding a problem website address, and then closing the web page that allowed me to add the address to block.

Firefox Quantum 67.0.3 (64-bit) on a Win7 PC.

Seems to be constantly writing to disk
160KB every 2 seconds meaning over the course of a day it's written nearly 7GB to disk.
I believe this will reduce my SSD's life so I will not use this add-on until this issue is resolved.