For linux 18:
Go to about:config in firefox new tab
Turn on toolkit.legacyUserProfileCustomizations.stylesheets
Then go to ~/.mozilla/firefox/1sbqh1j5.default/
cd ~/.mozilla/firefox/
cd to xxxx.default folder in it
Create folder named chrome
mkdir chrome
Create file named userChrome.css in it
touch userChrome.css
Open it in vim, nano, or any code editor
vi userChrome.sss
add the following code:
/*
* Bookmarks toolbar is visible only on new tab page, just like Chrome.
*
* Screenshot: https://vimeo.com/235059188
* Video: https://vimeo.com/240436456
*
* Contributor(s): https://www.reddit.com/user/AJtfM7zT4tJdaZsm and Andrei Cristian Petcu
* https://www.reddit.com/r/FirefoxCSS/comments/7evwow/show_bookmarks_toolbar_only_on_new_tab/
*/
#main-window #PersonalToolbar {
visibility: collapse !important;
}
#main-window[title^="about:newtab"] #PersonalToolbar,
#main-window[title^="New Tab"] #PersonalToolbar,
#main-window[title^="Nightly"] #PersonalToolbar,
#main-window[title^="Mozilla Firefox"] #PersonalToolbar,
#main-window[title^="Firefox"] #PersonalToolbar,
#main-window[title^="新标签页"] #PersonalToolbar,
#main-window[title^="Customize Firefox"] #PersonalToolbar {
visibility: visible !important;
}
Restart browser