iceweasel plugin

Where are iceweasel storing its plugins? And how to remove a plugin? Debian uses three directories to place plugins for iceweasel:

1. ~/.mozilla/plugins/
2. /usr/lib/mozilla/plugins/
3. /usr/lib/iceweasel/plugins/

Any plugin file or symbol link to plugin file in those directories is enabled plugin for iceweasel.

I do not know other guy's boxes, but in my box, disabling a plugin via the iceweasel tools menu can not succeed actually. You have to find the plugin file in the three directories mentioned above and move it out to other place in order to remove a plugin.

Java Plugin for Iceweasel

I installed the sun-java6-plugin package on Debian, and iceweasel's about:plugins lists the Java plugin, but it can not really work.
Solution:

$ cd ~/.mozilla/plugins
$ ln -s /usr/lib/jvm/java-6-sun-1.6.0.07/jre/plugin/i386/ns7/libjavaplugin_oji.so

有用的firefox插件

1. google browser sync：从此，在任何地方我的firefox书签都可以被同步了。
2. menu editor：可以用来编辑firefox的系统菜单、上下文菜单，隐藏八辈子都用不着的菜单项。
3. google notebook：一个笔记程序，可以在浏览网页的同时随手摘抄，google的，当然可以服务器端同步笔记内容。
   
4. Adblock：有的网站的flash广告海多，可以用这个插件屏蔽。