Rated 3 out of 5 stars

Despite being lightweight, this addon is waay too slooow...
I have to wait several seconds for the page to render when changing zoom levels. I have to look at text being written line-by-line when I get to a new page or change zoom level... I have to wait for it to think of something when I get to a page rich of formulas and try to scroll...
Also, at zoom levels <= 130% fonts rendering appears ugly, though on bigger sizes they look OK.
Also, I have to rotate mouse wheel too many times to scroll one page. Would be better if it scrolled more on single rotation.
Still, this is better than nothing. Good to have when you can't install kparts plugin or Adobe viewer.

This review is for a previous version of the add-on (0.8.1). 

Rated 5 out of 5 stars

This is a really fast and lightweight PDF reader. I love this!

This review is for a previous version of the add-on (0.8.1). 

Lightweight alternative to Adobe PDF Reader Rated 5 out of 5 stars

Rendering can be a little slow, but PDF Viewer doesn't jank your computer like that behemoth Adobe PDF Reader.

This review is for a previous version of the add-on (0.8.1). 

Rated 3 out of 5 stars

Works slightly faster in every single next version. Thank you. And a small feature request - if possible please allow paper color changing for those of us with impaired vision.

This review is for a previous version of the add-on (0.8.1). 

Good replacement on FF Mac for the broken Acrobat Plugin - No print option though Rated 4 out of 5 stars

Love the plugin. Works as designed and good replacement on the Mac OS X platform since the Acrobat Plugin does not work consistently. The only negative is that it does not have a print option in it's toolbar, forcing the user to download the document if they want to print it.

If you are on Mac OS X (current version) with Firefox (ESR or regular version), this is a must have!

This review is for a previous version of the add-on (0.8.1). 

Finally! Rated 4 out of 5 stars

Finally I can read pdf-s inside my Firefox. For a very long time, I hadn't been able to see pdfs, probably due to some misunderstanding with Okular or something. Never bothered to check what's the reason (ok, me lazy) and I used Konqueror to read them. Now I can do it also in FF. :)
So far I've opened only 3 pdfs, but they worked great, opened quite quickly and the rendering is absolutely ok - all the figures and formulas look correctly. Text-select also works, but figure-select - no, so I suggest you try to implement that as well. Otherwise it's quite cool. 4 stars from me.

This review is for a previous version of the add-on (0.8.1). 

Almost there! Rated 4 out of 5 stars

This viewer supports 93% of PDFs (or so). It is almost to the point where you can completely use it and nothing else.

Some people claim that this is a source of vulernabilites -- it is not. JS is more secure than Java (by a lot) and a little more secure than plugins, which can cause security holes on their own.

Keep up the good work, guys!

This review is for a previous version of the add-on (0.8.1). 

I agree Rated 1 out of 5 stars

I agree with what others said: it's absolute crapware. Now I have to uninstall it from each of my computers, and tell my customers how to do it...
or more simpler: tell them how to install Chrome or go back to MSIE. :-(
Please, please, please undo this with your next auto-update.

This review is for a previous version of the add-on (0.8.1). 

Rated 1 out of 5 stars

crapware of pre-alpha quality.

This review is for a previous version of the add-on (0.8.1). 

Not a good PDF viewer Rated 1 out of 5 stars

I really don't like this viewer. It's very slow and uses huge amounts of resources. I can't blow up images more than 200% (Adobe goes up to 800%), which I need to read the maps I use every day. It's hard to find the controls. And, worst of all, no one asked my permission to make the change. If I can't use Adobe, I'll have to leave Firefox for something that supports Acrobat.

This review is for a previous version of the add-on (0.8.1). 

To use acrobat follow these instructions https://support.mozilla.org/kb/disable-built-pdf-viewer-and-use-another-viewer

Extremely slow Rated 1 out of 5 stars

I want to use Acrobat Reader!!

This review is for a previous version of the add-on (0.8.1). 

To use acrobat follow these instructions https://support.mozilla.org/kb/disable-built-pdf-viewer-and-use-another-viewer

WHY?!?! Rated 1 out of 5 stars

Why force this non finished useless thing on users?I haven't seen any PDFs that rendered normaly.I use PDF on my own site and I have to train my customers to switch off this usless junk.Thanks.

This review is for a previous version of the add-on (0.8.1). 

How can this be firefox default pdf reader ?!? Rated 1 out of 5 stars

Almost every .pdf can't be loaded, and this application only suggests you to open your file with another pdf viewer. And if "pdfjs" can read your file, you'll have to wait for a while until it displays.Fortunately, by reading the comments here, I found out how to disable it and use another viewer.

This review is for a previous version of the add-on (0.7.236). 

Worth just one star (if any) Rated 1 out of 5 stars

This plugin takes ages to load the pdf, slows down everything and prints with poor quality. In addition it reports that a lot of the pdfs shown might not be displayed correctly and suggests itself to use another program. At least it is honest and confesses to be useless... I hope the advice on how to disable this "thing" work out well.

This review is for a previous version of the add-on (0.7.236). 

Loss of functionality Rated 1 out of 5 stars

This seems to be the standard pdf viewer in the new Firefox 20.0 build. I access lots of files online for business and need to save them to shared drives on our private network.

This version of pdf reader removed the "Save As" function. If you recall it was the little floppy disk that would allow you to choose the saving directory as well as name the file.

Currently, you must either Download the file, which saves it to your Downloads folder with no options for naming conventions, or select Print, choose Adobe PDF, then it will bring you to windows explorer with the regular "save as" functionality.

This change disrupts work flow by adding unnecessary extra steps. New versions are supposed to be steps forward, not steps back. If this issue remains unaddressed we'll have to switch back to IE on all of our work computers to restore the "save as" functionality.

This review is for a previous version of the add-on (0.7.236). 

You can save as by doing Right click -> Save As or in the menu File -> Save as

Gave error on every pdf everywhere. Disabled it. Rated 1 out of 5 stars

I seriously jumped for joy today when I realized I could disable it. There don't seem to be any forums explaining to me why my pdfs were giving the error... which I'd like to know... except that I can't recall any pdfs anywhere on the entire internet ever opening without the error - once the viewer started running. ALSO... it would be REALLY nice if it said somewhere that it was a Firefox viewer. I had no idea. (I wish I could give it zero stars - seems odd that that is not possible.)

This review is for a previous version of the add-on (0.7.236). 

Hate it/switched it off... Rated 1 out of 5 stars

Simple clicking downloads the document into viewer instead to hdd... Eats time and resources in stupid way. When you open 600Megs PDF you will kill your PC easily.

This review is for a previous version of the add-on (0.7.236). 

Rated 3 out of 5 stars

A good start, but it's not ready for prime time. CPU usage skyrockets for more complex or scanned pdfs. Text finding is slow as it dynamically loads pages. I switched back to Adobe.

Mozilla - Changing my default pdf app preferences was very uncool. Not in the spirit of FOSS. Give people the choice to switch next time.

This review is for a previous version of the add-on (0.7.236). 

Rated 4 out of 5 stars

Works great with every PDF I have tried so far:
* Has page zooming (By default it tries to handle his automatically)
* Supports PDF bookmarks and links
* Has the standard array of Print, Download, etc. buttons

The one thing it is missing that would make it complete for me, is adjusting page display to stream double pages at a time.

This review is for a previous version of the add-on (0.7.236). 

Just perfect Rated 5 out of 5 stars

Just work perfectly as attended (much lighter and better than Adobe plugin)! :D

This review is for a previous version of the add-on (0.7.236).