fc15 下无法设置amule与firefox4的关联

1，依据amule官方

Firefox 2 and 3 (or later)

Handling ED2k links in Firefox can be configured in two ways: either for an individual user, or for all users of the computer.
Configuration for a single user

Insert about:config in the address bar

Right click on the list, select New, then Boolean; insert network.protocol-handler.external.ed2k as Preference Name and true as Value

Now another right click, select New and String; insert network.protocol-handler.app.ed2k as Preference Name and /path/to/ed2k (path to where the file is installed on your system) as Value.

For Ubuntu Lucid users, you should set the Value to just "ed2k" instead of "/usr/bin/ed2k".

For Firefox 3 and higher only, you should also:

Right click on the list, select New, then Boolean; insert network.protocol-handler.expose.ed2k as Preference Name and false as Value

After that, click over an ed2k link, and Firefox should ask which app you want to use to open the link. Choose /usr/bin/ed2k and it should work.
设置后，重启firefox4打开电驴连接网页，打开amule..无法关联。。。。 find / -name ed2k 结果是：/usr/bin/ed2k路径没错。修改为777权限也不行。

2，用 火狐的mldonkey 插件最新为0.12.。。。启动。。。首选项目没有amule模式。。。2.5.xpi版本出现兼容问题。

何解？