Firefox has a pref setting on the about:config page for each pref that you want to sync.

• services.sync.prefs.sync.*

So you can create additional prefs for the proxy settings (network.proxy.*).

Type about:config in the location (address) bar and press the "Enter" key to open the about:config page, just like you open a website by typing the URL in the location bar.

• If you see a warning message then you can confirm that you want to access the about:config page.

• use the Search bar at the top of the about:config page to locate preferences more easily
• preferences that have been modified and do not have the default value show as bold (user set)
• preferences that are user set (bold) can be reset to the default value via the right-click context menu
• preferences can be changed via the right-click context menu: Modify (String or Integer) or Toggle (Boolean) or by double-clicking the line with the pref
• preferences can be created via the right-click context menu: New -> String, Integer, Boolean

• http://kb.mozillazine.org/about:config

Thanks， is that means I just need to add “services.sync.prefs.sync.network.proxy.***” at about:config ? But how to set the values? I‘m not expert in computer stuffs, hope you can be more specific. : - )

No, you need to add each pref that you have modified and create a new Boolean services.sync.prefs.sync pref and set its value to true.

Modified prefs show as bold (user set).

Some examples of possible network.proxy prefs that you may have modified and the corresponding Boolean services.sync.prefs.sync pref:

• network.proxy.type -> services.sync.prefs.sync.network.proxy.type = true
• network.proxy.http -> services.sync.prefs.sync.network.proxy.http = true
• network.proxy.http_port -> services.sync.prefs.sync.network.proxy.http_port = true

If other network.proxy are bold and you need to include them then you can create the corresponding services.sync.prefs.sync pref (right-click: New > Boolean; value: true) by adding the user set network.proxy pref and possibly other prefs that you want to sync.

You can also (and probably should) create a copy of the prefs.js file in the Firefox profile folder.

Understood,thanks for your patience.

You're welcome