MM3 MM3-ProxySwitch

Firefox & Chrome Extension

You would like to save web pages and use these offline?

With the MM3-WebAssistant - Proxy Offline BrowserMM3-WebAssistant you click a link and the page is shown as normal, also adds the page to an archive on your hard disk enabling offline access, bookmarking and searching.
Go to Download MM3-WebAssistant - Proxy Offline BrowserMM3-WebAssistant - Proxy Offline Browser

In Browser Chrome by Google or Firefox and Thunderbird by Mozilla you can per default configure only the setting for one internet connection. If you liked to use once a direct connection or different proxy configurations, then the dialog "Connection Settings" has respectively to be executed newly.

With the MM3-ProxySwitchMM3-ProxySwitch you can manage different configurations and simply switch over between these. The following documentation describes the complete range of functions.


From Firefox 57, the previously used native interface (XUL) has been omitted, this caused a complete reprogramming with the new interface WebExtension of Firefox. This interface does not yet contain all previous functions. Therefore, in the extension MM3-ProxySwitchMM3-ProxySwitch for WebExtionsion the affected function is removed first.

Chrome Beta

By default, the Chrome browser uses the system settings for proxy configuration. The extension does not use the system settings for Chrome, but the settings specified in the extension. Other programs still use the system settings for access to the Internet.



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Gratis version (freeware and open source)
MM3-ProxySwitch - Firefox & Chrome Extension (Add-ons)


  • With one click on the symbol MM3-ProxySwitchMM3-ProxySwitch you can switch between the direct connection to the internet and a proxy configuration.

    You recognize the used connection by the symbol:
    • MM3 direct Internet connection
    • MM3-ProxySwitch a proxy configuration (If you don't use symbols in the Firefox, the configuration name is then highlighted in addition.)

    Tool Tipp

    The name of the used configuration and the name after switching are displayed.

    The names indicate:
    • Direct: Direct Internet connection
    • Manual: Proxy configuration entered in the browser manually
  • You can select a proxy configuration from the popup menu.
  • You can edit the proxy configurations with the menu Edit.

Editor for the proxy configuration

You can use the following keywords for the configuration:
http, ssl, ftp, gopher and socks
Enter the proxy for any required protocol.
  • For the protocol socks version 4 you enter: socks4
  • The protocol gopher isn't available in Firefox 4.
The same proxy is used for all protocols.
For the given domains the proxy shall not be used.
Several domains are separated by a comma. This corresponds to the syntax of Firefox.
URL to the script for the automatic proxy configuration.
With the parameter reload the script is loaded newly when switching.

Every configuration has a definite name and starts with the bracket [ and ends with the bracket ].
This name is displayed in the popup menu.
The bracket [ and ] as well as every keyword must be in a new line.
According to the structure in the following example.


  ssl =
  ftp =
  http=HTTP-Proxy of you provider

The two following proxy settings can in addition be specified:

Auto-detect proxy settings for this network
Use system proxy settings




When switching over the proxy configuration a other homepage can be displayed. To this you indicate the homepage at the respective proxy configuration with the keyword homepage.




Delete browser cache

Before you use the Offline Browser MM3-WebAssistant - Proxy Offline BrowserMM3-WebAssistant - Proxy Offline Browser, the cache of your browser should be deleted. With the keyword clear this is carried out automatically.





You can define short keys to switch between different proxy configurations.

Used keywords:
modifiers alt, control, shift, accel, meta (only for Macintosh)
If you need several modifiers, then you separate these by comma.


Please, restart the program after the definition.
If it shouldn't work after this, the short key is already used by another function.




At the same time press the short key: <alt> <control> <w>
The proxy configuration MM3-WebAssistant is then used.

Preference config

Would you like to change further preferences at switching of the proxy configuration? You set these to the keyword config: and a preference (name=value) at the respective proxy configuration.




The preference name network.proxy.socks_remote_dns controls whether DNS lookups for SOCKS v5 clients happen on the client or on the proxy server. With the value true the proxy server perform DNS lookups.

Activation of a proxy configuration

If you select a proxy configuration, then this is immediately used per default. With the keyword direct the select configuration is entered. The direct connection to the internet is used, however.





This is obvious if you use the automation of the proxy configuration and you don't need a proxy at every location.

Standard settings

If you liked to assign a standard setting to a keyword, then you give this pre-allocation after the last closing bracket ].

This is possible for the following keywords:
http, ssl, ftp, gopher, socks, socks4, socks5, noProxy, clear and homepage




Automation of the proxy configuration

If you use different networks with your laptop computer, then the required configuration can be determined automatically. There are two possibilities for it.

IP-Address determines proxy configuration

The IP address used currently determines the matching proxy configuration from several deposited entries.

The respective IP address is the name of the proxy configuration.
If you need an area of IP addresses, then you indicate only the constant part with that the IP address starts.

Optional the configuration with the name: default
This configuration is used, if nones of the given IPs are found.

You see the used syntax at the following example.


  • Configurations for the IP adresses:
    • IP address:
    • IP address area: to
  • One configuration for all other IPs
Enter for this in the editor:

The entry import=IP activates this function so that at every restart of the Firefox the matching proxy configuration is used.
Alternative: Use the MM3-ProxySwitchMM3-ProxySwitch menu: Import IP


If your computer binds several IPs at the same time, the order of the configurations is importance. The search for a matching IP starts with the last configuration.

Import of the proxy configuration from the Internet Explorer

If your Internet Explorer is already configured automatically into dependence of your network environment, then you can use this configuration also in the Firefox.

This proxy configuration gets the name in the MM3-ProxySwitchMM3-ProxySwitch: IE

Enter for this in the editor:

Now every restart of the Firefox imports the active proxy configuration of the Internet Explorer.
Alternative: Use the MM3-ProxySwitchMM3-ProxySwitch menu: Import IE

Note: This function is only available in the Firefox (version 1.5 and higher) for Windows.

Switching automatically

Starting the Firefox it is checked whether an URL is available. Into dependence of this test the direct connection to the Internet or the proxy is used.


testUrl=URL [direct|proxy|both] [name]

URL to be checked.
Check is executed if you activate in the Firefox: Direct connection to the Internet.
Check is only executed if a proxy configuration is activated.
Check is always executed
If in the test the URL is available, the proxy configuration is used.
Check is only executed if the proxy configuration is activated with this name.
If name is missing, the check is always executed.



testUrl= both MM3-WebAssistant

The availability of the MM3-WebAssistant - Proxy Offline BrowserMM3-WebAssistant - Proxy Offline Browser is checked here.
If this proxy has started, then this is used.


Editor: Format

The type can be formed with CSS syntax for font, size, colour, background etc.



Code for the formatting




In the editor the text is displayed with a monospace font.


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