Solved, thank you very much. Congratulations on your work with Iceweasel . Best regards.
Modifying portable.ini will not take effect in real-time, it can be done in the Iceweasel Preferences menu
Use decompression software (such as 7zip) to open browser\omni.ja\localization\en-US\browser\preferences\ open your language pack file Profiles\extensions\langpack-xxx@firefox.mozilla.org.xpi\browser\localization\xxx\browser\preferences\ Drag and drop the iceGestures.ftl and iceSetting.ftl files into this xpi package. Perhaps i should merge these two files into the official ftl.
Problem langpack firefox
Where is the password ...