Rated 5 out of 5 stars

The version posted on addons.mozilla.org is not compatible with newer versions of Firefox, but the one on Google Code is. Please find the current version at:

I've been using it for about a week on Firefox 24.0 on Linux and it's much better than any other UI prototyping apps I've tried using.

No Soap Rated 1 out of 5 stars

Incompatible with FF 20.xHasn't been compatible since before 14.x. Why is this even listed anywhere?

For those wanting to try this extension Rated 3 out of 5 stars

I just tried it for a couple of minutes. Don't take my rating seriously. I just want to tell those who want to try this extension that actually, you can download the latest version at its official sites, which does can be run in the latest Firefox (tested for 22.0). However, I've also notice that it'll cause some problem, like forcibly enable localization on other extensions, e.g. Multiple Tab Handler. Enjoy it! =]P.S. You can download it from here, http://pencil.evolus.vn/Downloads.html

Rated 1 out of 5 stars

Incompatible with FF 21.0, thus unable to try.

Somewhat buggy Rated 3 out of 5 stars

The extension changes the language for all other Firefox extensions to one it guesses from the default system locale. The website lists no way of contacting developers. The wiki page on the website is blank.

Making it work with FF13 Rated 5 out of 5 stars

It's fairly easy to get this working with FF13.

- Go to http://code.google.com/p/evoluspencil/downloads/list and download Pencil-1.3-4-fx.xpi
- It's a zip file, so rename it with a .zip extension and unzip it
- Edit the file application.ini and change the value of MaxVersion to something like 13.* (or a higher number to avoid it being deactivated by an update)
- Save the file, and zip up all the files. Then rename the .zip to .xpi
- Drag and drop the .xpi file onto FF. It'll install as normal, then when you restart Pencil will be installed.

It appears to work OK as far as I can see, but of course YMMV.

Not available for Firefox 13.0.1 Rated 3 out of 5 stars

Not available for Firefox 13.0.1

Легкая примочка для скетчинга всегда под рукой Rated 4 out of 5 stars

Легкое дополнение, в котором можно быстро набросать схему или диаграмму, черновик интерфейса или концепцию приложения, чтобы сохранить как картинку PNG и отправить коллегам.

Функции из «больших» дорогих приложений — в соседнем окне любимого браузера. Бесплатно. Здорово же!

Хотелось бы больше коллекций готовых элементов, но их, наверное, можно и самому подготовить, если пожелать разобраться.

Rated 5 out of 5 stars

works with firefox12, i updated firefox on ubuntu12.04 and its working

pls update for FF 12 Rated 4 out of 5 stars

Love the concept. Please update for Firefox 12. Thanks!

Rated 4 out of 5 stars

Great little mock-up and wire-framing tool! The "libraries" of elements you can add to a drawing are especially helpful.

Using Firefox 11 on Win7. It said Pencil wasn't compatible and wouldn't even list it on the regular Addon search. I installed it from the development site on Google Code that it works fine (http://code.google.com/p/evoluspencil/downloads/list).

Rated 4 out of 5 stars

This project is in active development over on Google Code, and is at version 1.3.4 now:


Haven't tested that version yet, and not sure why this addon page is not being kept up to date, but the project isn't abandoned.

Firefox 8 and above. Rated 5 out of 5 stars

Can you add Firefox 8 support.

Rated 1 out of 5 stars

Just wasted hours using this tool, before discovering that the newest versions can't export anything without fatal errors. Looked up the issues list on googlecode and found out that this app is not actively developed and critical bugs are not being addressed.

Great potential, but unusable in the current state without any functional export.

Rated 5 out of 5 stars

Your addon is so awesome. Please continue develop this addon for FF7. Thank you

Rated 4 out of 5 stars

For all those (Linux / Ubuntu) users desperately waiting for an updated version, I recommend installing the stand-alone version from the project site.
You can even install the i386-deb package via
dpkg -i --force-architecture

For me, so far, it works nicely.

Rated 3 out of 5 stars

Please update extension for FF4 and FF5 support!

Rated 4 out of 5 stars

For firefox 4 user, please check http://code.google.com/p/evoluspencil/issues/detail?id=300

You can start Pencil Sketching by clicking menu item in app menu (menu item after Help)

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

Rated 3 out of 5 stars

Please update for Firefox 4. I would really like to use this addon. I think it would be very useful.

Rated 5 out of 5 stars

Is it Firefox 4 ready?