usr/lib/firefox/defaults/preferences/vendor-firefox.js 

Since several months I have successfully used "lockPref" to lock settings (specifically, proxy settings) on Firefox 17 and Firefox 18.<br /> I am running Ubuntu 10.04, and I have used the file:<br /> /etc/firefox/pref/firefox.js. <br /> Firefox 17 did not always honor those settings. Often it did, sometimes it did'nt. I also found that there is another file location some people are using (?), and this is:<br /> usr/lib/firefox/defaults/preferences/vendor-firefox.js <br /> To be sure, I put my settings into both of them. With Firefox 18, it did honor those settings. So this was working well.<br /> (Note - I have NOT used any byteshifting or anything, as one can read was necessary for old versions of Firefox. There being no clear documentation by version, I feel I have no way to tell if this is actually still required or not. It was working without any byteshifting on Firefox 17 and 18.)<br /> <br /> I just upgraded to Firefox 19 - and voila (of course, I might say) again the settings are not being honored. This time they are NEVER honored. They are JUST IGNORED, EVERY TIME.<br /> <br /> This is very upsetting - can someone please point out what is now changed? <br /> Do I now need to use yet another configuration locking file location?<br /> Or do I suddenly need to do this byteshifting thing - if so what is the procedure right now for this?<br /> <br /> Settings I am trying to lock are:<br /> <br /> //set proxy server settings<br /> lockPref("network.proxy.http", "a.b.c.d");<br /> lockPref("network.proxy.http_port", yy);<br /> lockPref("network.proxy.https", "a.b.c.d");<br /> lockPref("network.proxy.https_port", yy);<br /> lockPref("network.proxy.no_proxies_on", "localhost, 127.0.0.1");<br /> lockPref("network.proxy.type", 1);