Just to be sure you mean: 'Show All Bookmarks'

Well I don't think it is possible in one profile.

2 suggestions:

- use the sidebar (view>sidebar>Bookmarks and the library

- ADVANCED: use 2 profiles

   + export bookmarks to a file
   + open/create a second profile with firefox -P --no-remote 
   + import bookmarks in new profile
   + open library
   + WATCH OUT!!!!... unfortunately firefox uses the last profile opened so it might be better to first start firefox -P --no-remote and create a new  profile

Maybe use a chrome URI and open the Library in two tabs/windows. The former opens the Library and the latter opens the bookmarks sidebar.

• chrome://browser/content/places/places.xul
• chrome://browser/content/bookmarks/bookmarksPanel.xul

cor-el said

• chrome://browser/content/places/places.xul
• chrome://browser/content/bookmarks/bookmarksPanel.xul

This solved the problem,but I have question- What is chrome URI?

A chrome URI is an address that starts with the chrome protocol (usually chrome://, similar to http(s):// used to access internet pages). Firefox uses the "chrome://" protocol to access its internal files and use chrome in other cases like userChrome.css (no relation with Google Chrome).

• https://developer.mozilla.org/en/Chrome

There are also data URIs that use the data:protocol and bookmarklets that use the javascript protocol (javascript:)

• https://en.wikipedia.org/wiki/Data:_URI_scheme
• https://en.wikipedia.org/wiki/Bookmarklet