Missing one critical element - UPDATED - No missing element Rated 5 out of 5 stars

You have many options, but missing something vital. You need to put in an option that says do not zoom UNLESS you press a hotkey / shift key. And once you hit the hotkey, and/or shift key it will open up immediately. The time limit you have on is ok to anyone who just wants to hover their mouse, but if you're in a picture rich environment, and you hit the time limit it opens up. I would set the time limit bigger, but if I do, even if I hit the shift key I would have to wait 1-5 seconds for it open because it's still following the time delay. Please put in an additional option to only open if we hit a key, and once we do, it should open immediately. After that I'll rate this a 5.

UPDATE:
Thanks for responding. I didn't know I had to hold the key down before I entered the picture. I was always clicking the display key while I was over it. Now I understand, and I love it. And with the extra option of maximizing the image with another key, it's perfect! Thanks again for the help. I raised my rating to 5!

This review is for a previous version of the add-on (3.2.1-signed). 

You can do it, like this

Go into Thumbnail Zoom Plus preferences. Set "Key to" to "display" and set the key to SHIFT, CTRL, ALT, or Right Mouse Button. Then pop-ups will appear only if that key is down when the mouse enters the thumbnail.

Killing my video card Rated 1 out of 5 stars

I had either this or similar plug in on my last pc build with same 7970 with absolutely no issues. For some reason this is throttling my VC up to 100% usage and my temps are getting up to 80c. When browsing and I mouse over a link my VC fan starts wailing then back to low when I move mouse off link. You can imagine how bad this is if you are on a link heavy website like reddit.

This review is for a previous version of the add-on (3.2.1-signed). 

Fixed in 3.3

This is fixed in the new 3.3 version of Thumbnail Zoom Plus.

ホワイトリスト設定がほしい Rated 3 out of 5 stars

私の場合埋め込み画像を拡大したいサイトは決まっていて、その数も少ないのでデフォルトでオンになっているサイトは全てオフにしてホワイトリストで画像拡大したいサイトを追加出来るようにして欲しい。
その他にチェックを入れると不必要なサイトでも画像拡大されて却って、使い勝手が悪い。

This review is for a previous version of the add-on (3.2.1-signed).  This user has a previous review of this add-on.

Awesome!! Rated 5 out of 5 stars

I just added and hovered my first thumbnail and I Love This!! It works perfect!

This review is for a previous version of the add-on (3.2.1-signed). 

Rated 1 out of 5 stars

Don't work for Pinterest anymore((

P.S. I am using version 3.2
My problem on Pinterest - no pop-ups at all. On other sites add-on is working. Thank you for your help.

This review is for a previous version of the add-on (3.2.1-signed). 

Thanks David Rated 5 out of 5 stars

Well you can use This addon Almost anywhere & for sure it wont let you down. even you can use To see pictures which are blocked If you have a image blocker. Sure Recommend it :)

This review is for a previous version of the add-on (3.2.1-signed).  This user has a previous review of this add-on.

A Little Problematic Rated 4 out of 5 stars

- The ability to disable per site with version 3.1 cured a big pain. But you still can't exclude a site from the tool bar menu button; you have to open the extensions page, find this extension, open the options, find the corresponding section and type the name of the address of the site for each website! It is so cumbersome!
- Still the keyboard loses focus if you forget your mouse on a small image.
- If the thumbnail is the original image itself, and it is not loaded fully, TZP shows only the loaded part of the image (TZP assumes that the browser cache is always trustworty and uses the erroneous image data from there.).
- Has a very high miss rate; especially for large images.

Example:

Goto this URL: http://electronics.stackexchange.com/q/141739/5542

There are three images:
A) http://i.stack.imgur.com/FPxoi.jpg
1.228px × 694px (scaled to 630px × 356px)
B) http://i.stack.imgur.com/2347i.jpg
362px × 234px
C) http://i.stack.imgur.com/3lDxp.jpg
1.293px × 415px (scaled to 630px × 202px)

TZP opens images (2) and (3), but ignores the image (1).

This review is for a previous version of the add-on (3.2.1-signed).  This user has a previous review of this add-on.

One of the Best ? Rated 5 out of 5 stars

J'apprécie beaucoup cet add-on ! Il me rend de grands services en photo, graphisme et consultation rapide d'image : je suis très content de m'en, servir beaucoup.

This review is for a previous version of the add-on (3.2.1-signed). 

Rated 4 out of 5 stars

Please make this:

>Disabled audio when playing webm movies in pop-ups (so they behave similarly to gif's).

optional, because for some people it was a feature, not a bug.

This review is for a previous version of the add-on (3.2.1-signed). 

Rated 5 out of 5 stars

thanks for solving problem with facebook

This review is for a previous version of the add-on (3.2.1-signed).  This user has a previous review of this add-on.

Rated 5 out of 5 stars

Can't see the images uploaded by peoples/pages on homepage.

when I put mouse the loading image shows up then it just disappears.

Using version 3.2 beta12

This review is for a previous version of the add-on (3.1.1-signed).  This user has 3 previous reviews of this add-on.

Rated 3 out of 5 stars

Seems to be a hit or miss on facebook, working perfectly for all other sites but I seem to be getting errors enlarging image thumbnails on facebook. Please fix it ASAP.

This review is for a previous version of the add-on (3.1.1-signed).  This user has 2 previous reviews of this add-on.

Essential Add-on for Image Viewing Rated 5 out of 5 stars

If you like to look at photos on webpages, you must get this extension. He has thought of virtually every contingency, and it is continually updated. My only complaint is that I can't get it in Chrome.

This review is for a previous version of the add-on (3.1.1-signed). 

Still not working properly on Ubuntu Rated 3 out of 5 stars

It can be pretty useful, but on Ubuntu, it still has the same "flicker after moving mouse" bug. Sometimes, it will stop and zoom correctly after a few seconds, but it's still annoying. (see YorpdeerKerman's review for v2.7, "Works well on Windows, not so much on Ubuntu")

This review is for a previous version of the add-on (3.1.1-signed). 

Rated 4 out of 5 stars

One of the most essential add-ons, some problems on Facebook coming up again, only about half of all pics can be shown, please look into it.

This review is for a previous version of the add-on (3.1.1-signed).  This user has 2 previous reviews of this add-on.

Rated 5 out of 5 stars

Awesome, this plugin change your utilisation of internet, when you d'ont have it something is missing ! Great update with exclusion of websites of your choice ! thank you.

This review is for a previous version of the add-on (3.1.1-signed). 

GIFV support maybe? Rated 4 out of 5 stars

It is like gyficat, but IMGUR's format. GIFV, is it possible to implement support for it? Thanks

This review is for a previous version of the add-on (3.1.1-signed).  This user has a previous review of this add-on.

Done in version 3.2 (now available).

Version 3.2 now lets you display .gifv files from imgur.com.

Rated 5 out of 5 stars

excellent add-on! this is exactly what i was looking for. i get annoyed at how much time ends up being wasted waiting for thumbnail images to open and load, especially on google images - the image loading is very slow, and the more browsing and images I would load the more my of my Mac's CPU and RAM would be relinquished. this add-on seems to prevent that from happening by using far less steps, processes, and resources to essentially accomplish the same task, by allowing the images to load immediately without having to open up new pages. this is a truly essential tool for the power-user.

the prefs are outstanding. he's included just about every relevant tweakable detail the user can fine tune to their liking.

thank you!

* installed on the latest Firefox Nightly Beta.

This review is for a previous version of the add-on (3.1.1-signed). 

Stopped working in Nightly! Rated 5 out of 5 stars

It's been broken in Nightly channel for a while now, kindly fix it!
I tested both stable and development version!
Appreciate it!
Update:
The Sweet developer toke less than 12 hour to response and update the beta to support Nightly again!
Thanks a million! :D

This review is for a previous version of the add-on (3.0.1-signed). 

Fixed in new beta

Fix for Nightly is released in 3.1beta1. https://addons.mozilla.org/en-US/firefox/addon/thumbnail-zoom-plus/versions/

Rated 5 out of 5 stars

Awesome addition of webm viewing!

This review is for a previous version of the add-on (3.0.1-signed).