插件介绍
APNG是一款可以让Chrome浏览器支持APNG格式的动画图片的谷歌浏览器插件。
APNG的开发背景
APNG是一种类似与GIF的PNG动画图片，由于PNG格式图片的小巧等优点，现在多数网站已经习惯采样PNG格式的图片来代替JPG以及GIF格式的图片了，但是APNG格式却因为某些软件的不支持，只能显示出图片的第一帧，这样就会把PNG格式的动画，变成静态的PNG图片，其中Chrome浏览器就不支持APNG格式的动画图片，不过，今天给大家推荐的这款Chrome插件能够帮助用户解决这一问题，
APNG的简介
APNG是一款可以让Chrome浏览器支持APNG格式的动画图片的谷歌浏览器插件，在Chrome中安装了APNG插件以后，用户看到的动画PNG格式的图片就不会是静态的状态了，APNG插件会完美显示出该动画图片的每一帧，让APNG格式的动画图片能够像GIF动画一样在Chrome浏览器中能够正常地显示。
APNG的使用方法
1.在谷歌浏览器中安装APNG插件，并在Chrome的扩展器中启动支持APNG的功能，APNG插件的下载地址可以在本文的下方找到
2.在Chrome中安装了APNG以后，就可以点击Chrome右上角的APNG插件按钮，来启用APNG的功能了，如图所示：
3.在启动了APNG插件以后，在Chrome中的APNG格式的动画图片，就能够像GIF闪图一样“动”起来了，如图所示：
4.用户还可以在APNG插件的选项页面中，设置支持APNG图片的白名单和黑名单列表，如图所示：
Support for animated PNG images in Google Chrome browser.
? Chrome 59 now have native support of APNG, so you do not need this extension anymore. Goodbye, it was an interesting 6 years! ?
About APNG format: http://en.wikipedia.org/wiki/APNG
This extension animates IMG elements. Also it animates background images/list style images from css styles (p style="…"), but CSS images support may be incomplete.
You can prevent this extension from work on specific domains (Black List mode, default) or allowed it to work ONLY on specific domains (White List mode).
Source code is available on GitHub: https://github.com/davidmz/apng-chrome
WARNING! CAPTCHA may not work on some sites because of this expansion (it is not always possible to correctly detect captcha images). If captcha does not work on some site, just (temporarily) disable the extension on the it.
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Latest notable changes:
3.1.0 (2017-06-07) Chrome 59 now have native support of APNG, so you do not need this extension anymore. Goodbye, it was an interesting 6 years!
3.0.0 (2016-09-12) IT WORKS AGAIN!!!
In Chrome 48 (Feb 2016) Google turns off getCSSCanvasContext API. It was the critical part of extension, and within six months the Chrome has no technologies to animate images. Fortunately, it has changed recently and now this extension works again.
In version 3 algorithm was changed from canvas animation to APNG → animated WebP conversion.
2.1.4 (2014-11-28) Fixed some incorrect captcha images.
2.1.2 (2014-01-15) Better Reddit support.
2.1.0 (2014-01-12) Partial Reddit emotes support.
2.0.7 (2014-01-12) Redirects support.
2.0.4 (2013-05-26) Ext. was broken because of bug 238071 in Chrome 27. Fixed it.
2.0.3 (2013-03-19) Fixed bug with images with 'auto' height/width in style.
2.0.0 (2012-10-01) Most of the code rewritten. CSS background/list animations is turned off (except inline styles). Fixed slow work in some sites (g+, gmail and so on).
0.7.1 (2012-04-07) animated-gif-captcha images support (strange captchas of wedge.org)
0.7.0 (2011-08-03) fix for facepunch.com (perhaps the only site where this extension is actually used:))
0.6.9 (2011-07-14) data: url support, fixes for google maps images
0.6.8 (2011-07-09) fixed bug with CAPTCHA images
0.6.7 (2011-07-03) support for list-style-images
0.6.6 (2011-06-30) tracking changes in image's 'src'
0.6.2 (2011-06-30) background-image animation for internal and external CSS
浏览器插件安装详细步骤：Chrome浏览器如何安装插件扩展
