THANK YOU SO MUCH Rated 5 out of 5 stars

I installed some Helvetica fonts and they took over my firefox; this add on fixed and i'm so happy! <3

This review is for a previous version of the add-on (1.2.0). 

Good Rated 5 out of 5 stars

Five stars

This review is for a previous version of the add-on (1.2.0).  This user has a previous review of this add-on.

Awesome app Rated 5 out of 5 stars

A colossal thank you to the developers, satify my curiousity everytime whenever I come across beuatiful typography.

This review is for a previous version of the add-on (1.2.0). 

Not work with e10s Rated 1 out of 5 stars

Not work with e10s

This review is for a previous version of the add-on (1.2.0). 

Rated 5 out of 5 stars

Very useful for webdesigners or if you're simply curious. Does what it says in the description. A bit slow sometimes but that could also be due to my old machine.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Slow; needs work Rated 3 out of 5 stars

The extension is very useful for people who are curious about what font a page is using. However, my problem is that it slows Firefox down dramatically on my computer (Fedora 22, Firefox 39, 2.2 GHz dual-core with 2 GB RAM). I know, not a high-end machine, but without this extension, everything is pretty snappy. With this extension enabled, almost every page has the "Unresponsive Script" dialog asking if I want to stop the scripts on the page. I use several other extensions and none of the others have this problem.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Specific! Rated 4 out of 5 stars

Salut!

1) There is no constant effect: font is replaced until page be reloaded.

2) There is no global effect. You replace font on one page of the site, and the other page of the same site has fonts you just tried to eliminate.

3) There is no universal effect at all. Once you try to wipe out Comic Sans from your life, you must replace it on each and every site you meet, each and every time you visit any page.

Conclusion: useful for designers to check layout or to analyse competitors. Not usable for convenient Firefox users.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Sorry for the confusion, End User, but Font Finder isn't meant to be a permanent on-page replacement tool. Its meant for debugging and tuning (much like the Developer Console & Firebug.)

If you're looking for a more permanent solution, maybe something powered by GreaseMonkey could serve your needs.

There are some issues Rated 3 out of 5 stars

My initial testing was too optimistic. There are some issues.

It's toolbar icon in the customization menu is broken(but not after being placed on the bars.) However, I wont risk keeping it there because buggy icons destroy custom setups.

It also is failing when tested on this very page. It is able to get the font in some sections- and in others it wrongly claims multiple element selections.

I like the extension- but it needs some work.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Shows wrong rendered font Rated 1 out of 5 stars

This extension is worse than useless because, although it shows the correct font stack, it can actually show the wrong rendered font.

For example, I have a stack that starts with Georgia, Times, etc... This extension claims that the font actually rendered is Times, but that's simply untrue; Georgia is available and is being rendered. Although they're fairly similar fonts, I know the difference between the two -- just zoom in on a lower-case "i" or "j" and it's obvious. (I used to teach typographic design.) Anyway, just to make sure I wasn't making a mistake, I checked it against a font book. I wasn't wrong; the extension was.

I don't know what the problem is with this extension. Might it be because I'm using an older version of Mac OSX? (Snow Leopard, 10.6.8.) Hard to believe that would matter... and if there's a compatibility issue, it should just refuse to work at all. Anyway, until they correct this bug, I advise people to avoid it because it could confuse you big-time.

By the way, they do seem to have fixed the entirely different problem I reported back in 2012, in my prior 1-star review. I thought I'd give this another chance now. Oh well.

This review is for a previous version of the add-on (1.1.1.1-signed).  This user has a previous review of this add-on.

Can you give an example?

Can you put up an example on http://jsfiddle.net/? That would be incredibly useful in helping us fix it. We detect the font based on replaying the CSS' stack and then stubbing a bunch of elements to find a matching height/width (that's why fixed-width fonts won't work.)

I've been playing with a new mechanism against more modern versions of FF, but a live example of an unhappy result would really help me vet the possible new solution.

Thanks Rated 5 out of 5 stars

All info packed in one. Exactly what I need

This review is for a previous version of the add-on (1.1.1.1-signed). 

Love it Rated 5 out of 5 stars

I don't know where the idea came from but it is good. This addon helps a lot and we don't waste time in searching and comparing.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Rated 5 out of 5 stars

Useful and easy to use

This review is for a previous version of the add-on (1.1.1.1-signed). 

Awesome Rated 5 out of 5 stars

There are different utilities where you need to enter specific information about a part of content (which has to be recognized) on an exact page. With this extension you can get the data separately or at a time. It's very useful.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Rated 5 out of 5 stars

From now on if I find some interesting font I'll know how to check it.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Helpful Rated 5 out of 5 stars

It's very useful in applying some font characteristics to another place. You can get what you look for, copy it and then use it as you wish.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Thanks Rated 5 out of 5 stars

Thanks to the developers. It comes in handy and saves time instead of searching and comparing.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Rated 5 out of 5 stars

I agree that you can find info using Firebug but with this extension is much easier.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Rated 3 out of 5 stars

You can get all returned data from Firebug. However some people have no idea what Firebug is so Fond Finder is good for them.

This review is for a previous version of the add-on (1.1.1.1-signed). 

Rated 3 out of 5 stars

It seems buggy sometimes but my purpose is to find out which font was used. I'm satisfied with the results and think it's useful

This review is for a previous version of the add-on (1.1.1.1-signed). 

Good stuff Rated 5 out of 5 stars

You can get the info about any font on the page through Firebug but this tool gives you all the data collected and listed in groups. I like this option for changing the font of the entire page.

This review is for a previous version of the add-on (1.1.1.1-signed).