See my reply here:

• [/questions/1065081#answer-736159]

Thank you! How about for the others (subscribe to this page, bookmark this page)?

You would create a similar style rule using the relevant selectors (the parts to the left of the { which indicate what parts of the browser to style). The selectors you need are the unique IDs of the various items on the menu as shown in the attached screen shot. When using an ID selector in a CSS rule, you precede the ID text with a # symbol. For example:

Bookmark This Page => #menu_bookmarkThisPage

Note: I haven't tested that out myself.

#menu_bookmarkThisPage,
#subscribeToPageMenuitem,
#subscribeToPageMenupopup  {
 display:none!important;
}

#BMB_bookmarkThisPage,
#BMB_subscribeToPageMenuitem,
#BMB_subscribeToPageMenupopup, #BMB_subscribeToPageMenupopup+menuseparator {
 display:none!important;
}

You can right-click the Pocket button and click "Remove from Toolbar" or "Remove from Menu" to disable Pocket and move the Pocket button to the Customize palette. That will also remove the Pocket entries in the Bookmarks menu. This only works if browser.pocket.enabled = true , so if you previously toggled this pref to false then you can undo this action with a double-click.

See also:

• https://support.mozilla.org/kb/disable-pocket-firefox