Pearl Crescent Page Saver is an extension for Mozilla Firefox that lets you capture images of web pages in PNG format. The entire page or just the visible portion may be captured. ...snip... Page Saver uses the canvas feature that was introduced in Firefox 1.5.
System Requirements and Locales
Page Saver works with Firefox 1.5 and 2.0 on Microsoft Windows, Linux x86, and Mac OS X.
Page Saver includes the following locales:
en‑US, cs‑CZ, da‑DK, de‑DE, es‑ES, fr‑FR, it‑IT, ja‑JP, ko‑KR, pt‑BR, ru‑RU, sk‑SK, sl‑SI, zh‑CN, zh‑TW.
http://pearlcrescent.com/products/pagesaver/
Basic verzija je skroz funkcionalna, bar sto se tice upisivanja u png fajl. Za advanced upotrebe (live preview web sajtova kroz neki backend mozda..), $15 uopste nije mnogo.