I use this New Addon Bar (https://addons.mozilla.org/en-US/firefox/addon/new-add-on-bar/ ), but why can’t an Addon bar be provided by default(disabled by default)?
Add-ons Bar is deprecated design, it has been replaced by new UI elements.
Please wait https://bugzilla.mozilla.org/show_bug.cgi?id=1215064 for add-ons expand it in Fx57 or higher.
Thanks. Now, I have voted for the bug and started following it.