Wow. This add-on is everything you could want and more for site blocking. It puts other blocking add-ons to shame!

Adding a policy to guard the plugin and to prevent private mode is a requirement for this to be useful if you are tech savvy and would want to remove the site blocker.

Simple et efficace

Learn basic regular expressions and this becomes an amazing anti-distraction tool. You can specify block times separately per day & even use custom redirects.

The best app ever to protect yourself from your porn addiction. You have to add the sites manually. Remember to activate it in private windows.

Amazing just what i was looking for.(been looking for something like this for months) thanks

Best extension to avoid distractions by blocking the websites.. I am detoxing myself from social networking platforms..

Best blocker extension for me. A big improvememt would be to sync the settings across different browsers.

I went out to do errands, came back to it, now it works

Thank you for your extension!!! I hope Mozilla not remove it. They don't have any password to firefox for our protection. I think there is a problem here. If I close the extension and open it again, the addon closes all block sites. Can you fix this?

I wrote a css override to make it more encouraging.
The code below makes the custom message you write look fancier, and removes the discouraging ! sign. I'd much rather block sites gently.
Thank you for such an awesome plugin though.

body {
background-image: url(https://source.unsplash.com/collection/139386/1920x1080/?sig=) !important;
background-repeat: no-repeat;
background-size: cover;

}
h1, table, #exception,#options, #switch,footer,header{
display:none !important;
}
#message {
width: 100%;
text-align: center;
font-size: 5em;
padding: 0 !important;
height: 100%;
display: flex;
align-items: center;
justify-content: center;
font-weight: 100;
background: #222222ba;
margin: 0 !important;
}

This is the best site blocking add-on.