The new 4.0 just doesn't work with the updated Firefox. I installed the older version with 50.1.0 it working so far. I have also made sure that it won't update either options via add-on page. I disagree with developer that its scripts. The 3.5.23 has scripts too.

install 3.5.23. then goto preferences and check update off.

4.X is cancer and will drive you nuts.

That's all. This was one of my favorite add-ons before the most recent update.

I've been using this addon for years now. With the exception of some updates wiping the logins, I was perfectly happy with it. However, as of the latest major update, I must shave off some stars.

I would please ask you to revert the controls back to the previous version, or in the very least add an option to continue using them. I very much preferred clicking the icon to open all my accounts which had unread emails, using middle-click to quickly scan and right click for options. Now i have to left click and navigate the context menu to do all three and I do not like it.

Please, bring back the right click menu. I rolled back to version 3.5.23 in the meantime. Thanks for this great addon.

If like me you use x-notifier to keep all your email sign-ins in one place you were mortified to find that updating to ver 4 resulted in all your sign ins gone. All is not lost. Reinstall version 3.5.23 from

http://xnotifier.tobwithu.com/history.php?br=ff

and then your logins all reappear. Export them from options, and then you can import them to the latest version. I wish this had been better handled, but x-notifier is so critical I am giving another 5 star review.

Now is the time to send some love in the form of a contribution to the author. He deals with major crap so we don't have to.... This was our turn...

X-Notifier won't check for Yahoo Mail.

This rating is for the Nov 2016 release. The prior release is 5 stars.

I don't like the new version because:
1. Mutliple hotmail accounts are broken. They take one to the Microsoft log in page. Pain. (Checked both in Chrome and in Firefox). I have two. So, one is greyed out and the other is displayed in red. The one I used last (through manual log in) gets greyed out and the other becomes red. Still, logging in is required for both.

2. The right click was removed with all its nice behavior. The new look is clunky and requires getting used to it.

Version 3 rocks. Version 4 is... ehhh... unusable.

Had to downgrade to version 3 to get 5 star performance.

If usability is restored, I will change the rating.

For my environment, it is not about Firefox since version 3 works fine in the latest Firefox.

Firefox has done this to so many good addons. If I wanted security I'd get off the internet. Chrome addons are inferior in action, google has succeeded in nothing except sandboxing your personal info for themselves to feast on. FF is a memory hog and memory sieve, but it is a hell of a lot more aesthetic than chrome

Go here: https://addons.mozilla.org/en-US/firefox/addon/xnotifier/versions/
download version 3.5.23.
Then go to your add-ons, find it, and in its options there is the possibility to turn off automatic updates.So it will work just fine :)

If anyone has destroyed anything, that's Mozilla with their decision to drop XUL, not tobwithu. I am frustrated, too, but please, read his notes before deciding to give it a bad rating. Also be aware that there is an issue with black text on dark themes that has been posted in forums.
Re-installing 3.5.x automatically brings your old account settings back (logins, scripts, RSS, etc). - they're not lost, actually (make sure you disable automatic updates on the extension's "More" page).
While looking fwd to see scripting back (or a replacement) and Neo growing mature, I'll use 3.5 for as long as FFox allows it. (If you think it's time to say goodbye, it's maybe time to say goodbye to FFox... although I probably won't. Sad.)

why you destroyed it???

Every time I use CCleaner, I need to re-write all email adresses and passwords.
I use this addon since many years, but now I will cancel it ... and test an other one for messages

I'm so sad , i have used xnotifier for about 6 years . the latest update 4.0 is awful and disappointing , can't get it work with my 8 accounts and I keep refreshing many times until get all my accounts logging in . Now it takes 4 ever and age to login to all accounts . I'm searching for alternatives. Good bey my sweaty . It's now a web-based and not an actual add-one i think so.
Developer's note
########################################################################
X-notifier 4.0 does not support user script because of the internal changes in Firefox.
########################################################################
It's ffox decision 2 destroy the xnotifier

This was such a great add-on. But now it's very painful to check emails. It's good I suppose if you have 1 email account. But when you have 7 like I do this use to work seamlessly. If anyone is having any issues with the new update, simply install the old version 3.5.23. But in the future FireFox is going to make the old version stop working which will be said.

Too bad I have used this addon for years. I was not able to have the latest version work with more than one email address. Too bad since the added value of this addon is (was...) to be able to monitor and open simultaneously several inboxes.
Hopes it returns to normal quickly.

Hola la version 4 es malisima he tenido que volver la version 3.5
Primero en heramientas complementos desactivar actualizaciones automaticamente y luego volves a instalar x notifier 3.5 que va fenomenal un saludo a todos

I've been using this few years and it worked great for me. Now every time I close Firefox it clears out all of the data associated with my email accounts. To use it at all, I have to reconfigure it EVERY time I start Firefox. If it goes unfixed I'm removing it all together.

After setting everything up, it *used* to work okay and would check for email from my three different accounts. There were even options to check in folders for things that were automatically moved with filters.
However, the new version seems to have removed a lot of capabilities - it's now web-based instead of an actual add-on, and the most annoying thing - it upgraded automatically and cleared out all that information I'd originally set up. Maybe it works, maybe it doesn't. I'm not willing to spend the time AGAIN to configure my three email accounts. A huge change like this without porting the configuration data over to the new platform is inexcusable. As far as I saw, there wasn't even a notice given. It was two weeks before I realized it wasn't doing anything.

Works with my isp email and zoho email without adding scripts.

Uso X-Notifier da anni e sono rimasta malissimo quando ho provato decine di volte a installare l'ultima versione su Firefox, senza successo. Sono dovuta passare a Chrome, ma resto insoddisfatta, era molto meglio la versione 3.5 !!!

I was able to click once and all email accounts that had email would open in individual tabs. No more it seems. Now I have to click twice just to get in one email account. If you have two yahoo accounts it has trouble logging out of one and into the other...
Middle click use to refresh the new message count, now broken.
Right click no longer interacts with the addon button.

When things peak on functionality it seems they have to start intentionally removing and breaking things just to release something "new."

NEW VERSION IS TERRIBLE, I'M RETURNED TO THE OLD VERSION. DO NOT UPDATE WITHOUT FIX THESE PROBLEMS.

New update makes this application a hassle to use. Used to be my to go add on for firefox.

Used to be a very good extension.

Now ... Forget about it ... Maybe it is a good thing to get prepared for what will happen in next year (no more user scripts, no side bar/ window, etc.).
I really do not understand Mozilla's policy to align with Google Chrome's one, follow the "big brother"? Since when Google drives this game? Since 15 years ago, when you were not able to get a free Gmail account without an invitation? Is Firefox an open-source software that listen to the crowd, or to the other competitors? Firefox users want to have user scripts! I'm still using FF 3, yes Firefox version 3 for my bank transactions (and I never had an issue); what is this FF 50 version, a game? Let's go and get Chrome 56+ version? For those who want Chrome, let them to have it (the true Google Chrome!) For us, the others, we want Firefox WITH user scripts! ... Never mind ... Let's go back on track!

Old X-notifier version 3.5.23 does not work anymore with M$ servers (Outlook.com, Hotmail ...). I'd expect in a few weeks none of free services (Yahoo, Gmail, etc.) will work ...

New version 4.x.x? Without side window? No way! And it will delete the existing accounts ... Do a backup/ export ASAP! (Better do it for the entire Firefox! please see FEBE add-on, if you're not on portable version, aka www.portableapps.com).

Look somewhere else ...
Read Yahoo emails in Gmail? Is that secure?
Howard Email Notifier, POP Peeper , POPman ... as alternatives for Windows users?
Or Geary for Linux users ... (or Pantheon Mail) ... ?

Or setup your own mail server, maybe on a small Raspberry Pi?

Let me know what it will be your choice/ best next experience ...

Regards