ottimo

I cannot give more then 3 stars for being very un-intuitive and quite restrictive.

I went to advanced settings, I wrote hours, minutes and ... You get some -- that you must fill, yet. I thought seconds? no. Maybe just leave it and it will be defaulted to some value? no, you must fill it... After clicking random stuff at keyboard it turned out you can fill it with 'a' for AM or 'p' for PM. Great, but how am I supposed to understand that? It's not how other apps do it, nor how it is expected to work. Also for only 2 options "combo-box" could work more intuitively then input field.

Second problem - why force people to use AM/PM in first place? Wheres switch to not use it? I don't even know what AM and PM 'is' (over-exaggeration, but I really prefer to look up which one is which, whenever I have to use it) I prefer 24h clock.
Also when I wrote 17 and it changed to 5, but didn't made it pm - it's definitely not overlooked, but specifically restricted...

good ideas would be : default hour to AM, if user writes 17, change it to 5 PM. Also by defaulting 3rd field into AM, user will know what is supposed to be here. '--' two dashes don't indicate best on what am I supposed to write here.

Good,but unlike the android app Lock me out this extension relies on fixed times being set the same for every week. I want the site to be blocked once I've accessed it for 15mins at whatever time of day I choose.

OK, so it works perfectly, and has the schedule option, so you can keep track of when to use a certain website and focus on other things. The thing is: getting it set up is a bit confusing and non-intuitive. I give it a 5 stars for functionality, and 2 stars for UI.

Unfortunately it doesn't work as I hoped.

My expectation - in addition to blocking possibly a particular site - is mainly to hide unwanted and blacklisted sites on BlockSite from search results.

Just like Personal Blocklist on Chrome does.
(the same Personal Blocklist for Firefox, by a different author, doesn't work either.)

Works just fine. However, I strongly dislike how it appears when one goes to a site one has blocked. It looks like you've been taken to some hack site. It would be MUCH BETTER if instead of the page heading being "Restricted Access" it said something like "This page/site has been block by the Block Site Firefox Addon."
Please, don't expect me to realize what is going on by seeing some stupid icon either. (I hate icons, but they're here to stay.) Secondly--although this may be an option--the screenshot shown in the example is white, while I get a BLACK screen (which, again, looks hackish).

A little quirky but does what it needs to do. I have a semi-issue where it doesn't remember that I've paused blocking when closing and reopening the firefox. It's kind of obnoxious so I might make an Issue on Github. A quicker path than going through the FF extensions manager to the config page would be nice as well. Some improved documentation on redirecting would be nice.

It does not block sites by URL, it actually has a totally different function from the name.

Good idea but this extension needs stronger security. My 11 year old son simply disabled the extension to get to the blocked website (Youtube). Aside from requiring a password to remove a website, the password should also be needed to allow (or disallow) a user from simply disabling the extension. Looking forward to a fixed extension with stronger security features.