I upgated my Firefox and neither Firefox or IE can use the Proxie server and the sceen to set up the Proxie server is grayed out and not changable.
I am using windows 7 and have used Firefox many years the last time I upgraded I could not connect to the World Wide Web sites but the direct connect sites ie. LOTRO work fine. Internet Explorer comes up with a "proxy server is not responding" and dose not load the page. When I follow the instructions to change the proxy server settings the page to do that all of the proxy buttons and wording is grayed out, not changeable. The other computers in the house work fine. The Upgrade of Firefox seem to corrupted the program for the proxy control.
jmaraszek
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Note that your System Details List shows that you have a user.js file in the profile folder to initialize some prefs on each start of Firefox.
The user.js file is only present if you or other software has created it, so normally it wouldn't be there. You should check its content with a plain text editor if you didn't create this file yourself.
The user.js file is read each time you start Firefox and initializes preferences to the value specified in this file, so preferences set via user.js can only be changed temporarily for the current session.
You do the network.proxy settings show on the about:config page?
network.proxy.type network.proxy.http network.proxy.http_port
Do they show as locked (italic)?