通用安装

firefox.exe -install-global-extension extension.xpi

具体简介

firefox.exe -profile "path to profile folder" -install-global-extension extension.xpi

批量安装

for %%e in ("path to extensions\*.xpi") do "firefox.exe" -install-global-extension "%%e"
for %%e in ("path to themes\*.jar") do "firefox.exe" -install-global-theme "%%e"

线程中有人声称它们以相同的方式为Thunderbird工作.