well, I use these links to the installed docs…just add your install path and put it in your bookmarks…primitive, but works…
/mozilla/help/content/home.html
/mozilla/help/content/base/start.html
/mozilla/help/content/base/basics.html
/mozilla/help/content/base/org.html
/mozilla/help/content/base/model.html
/mozilla/help/content/base/shadingrendering.html
/mozilla/help/content/base/assets.html
/mozilla/help/content/base/anim.html
/mozilla/help/content/base/char.html
/mozilla/help/content/base/dyn.html
/mozilla/help/content/base/part.html
/mozilla/help/content/base/audio3d.html
/mozilla/help/content/base/comp.html
/mozilla/help/content/base/ref.html
/mozilla/help/content/commands/commands_and_expressions.html
/mozilla/help/content/helpcards/ops.html
p.s. just to add - you can't search in those either