Found one issue, excellent otherwise Rated 4 out of 5 stars

Every day I keep setting the addon to show Unread, but it keeps defaulting to Inbox showing Everything, both read and unread emails. I love it that clicking links in emails opens new tab in background leaving the popup intact in its current position.

Rated 5 out of 5 stars

I love this addon. Really efficient.

Rated 5 out of 5 stars

GW

There is nothing extra needed, Its full of features Rated 5 out of 5 stars

I have used few plugins already for the gmail, I must say this plugin is way much better than others, I havent opened my gmail in browser in many weeks i just do everything in this plugin. Hats off to you developer.

easy to use Rated 5 out of 5 stars

Would be better if this addon allow us to change the icon appearance .

Rated 5 out of 5 stars

A nice way to peek at your inbox. Lots to improve on - but still a great tool.

Doesn't show all emails in the popup Rated 1 out of 5 stars

Only shows "Important" emails from the inbox. There is no options in the addon to show all emails

nice Rated 5 out of 5 stars

simple!

This user has a previous review of this add-on.

Rated 1 out of 5 stars

Download Warning!
I'm still an IE user, but am trying FireFox again.
I read about this gMail add-on for Mozilla and read that public add-ons are reviewed before being offered for download. I felt fairly safe in trying this.

Then, just before the actual download, I got a warning to "Install Add-Ons only from authors whom you trust." And, just below that I was informed that "Author Not Verified."

If the Mozilla quality control process doesn't let Mozilla verify the author, how can I?

Maybe I'll go back to Microsoft where I expect things to lack transparency and common sense.

This review is for a previous version of the add-on (0.1.5.1-signed). 

Very good, but... Rated 4 out of 5 stars

(English)
It would be great if you can show the number of unread messages in simultaneous, each of the accounts connected

(Spanish)
Estaría genial que pueda mostrar la cantidad de mensajes no leidos, en simultaneo, de cada una de las cuentas conectadas

This review is for a previous version of the add-on (0.1.5.1-signed). 

very helpful addon Rated 4 out of 5 stars

Thanks!
Could be better if
1. show summary when mouse over the icon on toolbar
2. have an option to show only unread mail in small window

This review is for a previous version of the add-on (0.1.5.1-signed). 

2 remarks! Rated 3 out of 5 stars

1. Plz, fix this bug! http://prntscr.com/4slhvk
2. And add a separate button to open the site in a new tab.

This review is for a previous version of the add-on (0.1.5.1-signed).  This user has a previous review of this add-on.

Rated 5 out of 5 stars

Отличное расширение.

This review is for a previous version of the add-on (0.1.5.1-signed). 

Rated 5 out of 5 stars

Awesome add-on. Now I don't need to go to the real Gmail page. I can just click an icon and manage my emails from a small window. A+++

This review is for a previous version of the add-on (0.1.5.1-signed). 

Rated 5 out of 5 stars

Love this! I like that I can view my entire Inbox plus my folders, and reply to or forward emails right from the notifier, and I don't have to sign into my gmail account to do so. Bye-bye Gmail Notifier 0.4.7, it's Fastest Notifier for Gmail for me from now on!

This review is for a previous version of the add-on (0.1.4.1.1-signed). 

Rated 5 out of 5 stars

The best Gmail notifier in Firefox!

This review is for a previous version of the add-on (0.1.4.1.1-signed). 

Rated 4 out of 5 stars

Very good and comfortable extension to read/manage new mails without enter in Gmail page.

This review is for a previous version of the add-on (0.1.4.1.1-signed). 

Rated 5 out of 5 stars

After all these years of going to mail.google.com and then following the boring procedure of logging in and then viewing the emails not to mention when you wanted to view e-mails in another account you had to manually again signout and then login again to the other account (well they have modified that part now) and do the procedure as many times as required to get the results, this actually is the thing that I have been waiting for. I simply love this addon and I would even want a chrome version and android version for this.
Kudo's to the developer.
You just saved the day from wasting bandwidth for just going to the login screen back and forth.
Last one more touch up required is to be able to open the e-mails on the browser as required.
Otherwise It's a magnificent addon!

This review is for a previous version of the add-on (0.1.4.1.1-signed). 

Rated 3 out of 5 stars

It has a bug, please, fix it:
http://prntscr.com/4slhvk

This review is for a previous version of the add-on (0.1.4.1.1-signed). 

2 sugggestions Rated 4 out of 5 stars

Using this addon since Opera 12-, great addon but still two more suggestions for you:
1. middle click to icon to open directly google mail in new tab.
2. option for customize the size of pop up window.

thank you so much

This review is for a previous version of the add-on (0.1.4.1.1-signed).