Rated 4 out of 5 stars

A good tool that saves time. The blacklist is short. Though editing it isn't so hard. You unzip the xpi-file then find the file with text "facebook" and add whatever you want to the list.

Abandoned beta product Rated 1 out of 5 stars

Good intentions, but This project has clearly been abandoned for years. The hard-coded approach is obviously sub-optimal and it blocks Wikipedia by default (wtf?).

I think that LeechBlock, which is still under active development might do the trick.

A Must Have for your pordactivity Rated 4 out of 5 stars

A Must Have for your productivity
Pros:
Delay Most of the site where you waist your time going in an out so you get board waiting and quit if the reason that bring you there was to waist time.
Cons:
Some sites are delayed some don't It would be better if you had a option to disable for some and have another to add news once.

Very Promising Rated 5 out of 5 stars

I've tried many ways to help with managing my time on the internet and forming good habits. This has included a plugin to block distracting websites at certain times or after a certain amount of use, and a plugin to keep track of which sites I spend my time on. However, this has been relatively more effective at keeping me on task so far. The only downside -- as mentioned by many others -- is the difficulty in changing the blacklist. However, this is beta and will likely be changed as a result of the popularity of this complaint. For a beta -- this is a great plugin.

Must have for everybody Rated 5 out of 5 stars

This is obviously not a finished product, but it already works great! Thanks a lot for bringing this to firefox, hope you get enough support to develop this further and get to a level of full customization!

Good idea, but changing hardcoded list didn't work for me. Rated 3 out of 5 stars

I read Crystal's advice on how to change the hardcoded list and tried it, but unfortunately I must have made some error in main.js, because the list of sites this addon works for remains the same, and when I try to run main.js, Windows returns a syntax error. I am not well-versed in JavaScript, but I looked at the file in FiddleJS and couldn't see any glaring errors. Maybe I've just copied the file to the wrong place or something.

Please add customisation Rated 4 out of 5 stars

Thanks to Crystal for all the instructions. They didn't work for me: Firefox would delete the new xpi when it was restarted. Maybe this is something to do with signing extensions? Anyway, I think this add on would be great if there were any way to customise it: mainly the list of sites, but also the delay time (it's 60 seconds when I use it). I don't mind if you have to edit a setting in about:config to customise it. I use the add-on Silent Block by editing a setting in about:config to give the location of a list of sites to block.

PLEASE ADD EASY BLACKLIST CUSTOMIZATION Rated 5 out of 5 stars

This delaying mechanism is brilliant, and helps me focus my work on more importatnt things, but please, please add an easier method to customize the blacklist than the one outlined below. A big hand to Crystal for decoding that bit!

Rated 4 out of 5 stars

Its a great add on for procrastinators but its hard to customize the sites it does/doesn't blacklist. I see a lot of people having that issue so here's how to do it. (I had to ask about this in the support area. Credit for the solution goes to cor-el)

First click the Help button at the top of your Firefox browser. Click troubleshoot, then Show Folder in the window that appears. (Linux: Open Directory; Mac: Show in Finder)

In the folder that opens up there's a few possibilities for what you need to do next. You will either need to find a file labeled "delaysites-0.3.rev97.3.1-fx.xpi file" or " jid0-sTMoUXNNDmMz5gHkMrGC3RV8CKU@jetpack" (I will refer to this as a zipped program/files/folder from here on out).

I needed to find the second one. You will need a program to unzip or otherwise edit the zipped files. 7zip is a pretty good one.

Make sure you can see hidden files (http://kb.mozillazine.org/Show_hidden_files_and_folders)

Alright. Open up the zipped file with your unzipping tool, or you can copy that file, place it in a new folder, and unzip it there so you can edit it.

Whatever the case, Go to resources, then alexichr-1, and then lib. Inside the lib folder should be a file labeled main.js. Open that with notepad or something similar and you should see something like this:

var pageMod = require("page-mod");
var tabs = require("tabs");
const data = require("self").data;

pageMod.PageMod({
include: ["*.livejournal.com","*.facebook.com","*.reddit.com","http://www.google.com/reader/*","http://news.google.com/*","*.wikipedia.org","*.twitter.com"],
contentScriptWhen: 'ready',
contentScriptFile: data.url("blocker.js"),
});

Here you can remove, edit, or add websites, but you have to stay within the format provided. So for example. If I want to blacklist Tumblr I would add

,"*tumblr.com"

after the comma behind the twitter one. If I wanted to remove facebook I'd just delete:
,"*.facebook.com"

Once you finish, save. If you edited it within the zipped folder you are done. If you unzipped it just copy the newly edited main.js and paste it into the zipped folder. (Make sure you delete the original main.js of course, or overwrite it).

If you folder won't let you do that, like mine won't, you can get around this by opening it up, deleting the file, and then dragging the new file in, all while its still zipped.

If you can't edit zipped files you could always zip everything back up but I am not savvy enough to explain how to do that.

Also I'm not a help expert. If you have questions on the specifics or this isn't working for you I suggest you ask on the Mozilla support page. I just wanted to provide a more quick solution for peeps like myself who can figure it out with enough nudging in the right direction.

I like it Rated 4 out of 5 stars

I did not work for a site, which I opened a minute earlier

This review is for a previous version of the add-on (0.3.rev97.3.1-signed.1-signed). 

How do I add/remove blocked websites from the list? Rated 5 out of 5 stars

Cool extension! :) But it also blocks Wikipedia, etc. And lets open some other time-wasting websites. How can I edit the list of the blocked websites?Regards.

This review is for a previous version of the add-on (0.3.rev97.3.1-signed.1-signed). 

Rated 4 out of 5 stars

Great add-on! Works very well, but lacks customization (it's beta now). I edited the hardcoded list of websites and it helped me a lot.

This review is for a previous version of the add-on (0.3.rev97.3.1-signed.1-signed). 

Rated 4 out of 5 stars

Works well for the hardcoded sites(reddit, facebook, etc).
Not a major pain to edit the list(it's in main.js), but to gain more users a more user friendly way would be most welcome. :)

This review is for a previous version of the add-on (0.3.rev97.2.1-signed.1-signed).