No, it's still here.
You can get rid with custom CSS though, if you think it's worth it.
Open Notepad, or whatever text editor you like, and paste this into it:—
#unified-extensions-button {display: none !important}
Save it somewhere easy to find, like the Desktop, and call it userChrome.css (all lower case apart from the C in the middle). Make sure it has saved as userChrome.css and not userChrome.css.txt. In Windows you can right-click it and open Properties to see its full name. Correct it if needed.
In Firefox open about:config and set toolkit.legacyUserProfileCustomizations.stylesheets to true.
Now go to about:support. Look down the blue block on the left of the screen that will open until you come to "Profile Directory." Click the "Open Directory" button next to it. This will open your Profile Directory in Windows Explorer, or whatever file browser your system uses.
Make a directory/folder in that called chrome, all lower case. Now drag the userChrome.css file that you created earlier into that new chrome directory.
Restart Firefox for it to take effect.
