Toolbars aren't part of FF so you need contact whomever toolbar you installed for support on that.

prithaj.das said

i removed the ublock origin icon from my toolbar, but now i can't get it back on my toolbar.. i tried to find the show icon in the option but there was no such option. please help!!!

Please see this support article: https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars

Open the Customize feature, than locate the uBlock toolbar button in the palette and click&hold then drag it to the Navigation toolbar to the right of the URL bar. Exit Customize and that should fix it.

WestEnd said

Toolbars aren't part of FF so you need contact whomever toolbar you installed for support on that.

This is not a toolbar but a extension that has a toolbar icon. ;)

'the Ublock Origin icon won't stay on the menu bar. Help How do I keep this extension's icon on my toolbar?