a new programme has installed a button on the navigation bar that I can't remove by the usual method
I recently installed freemake video converter. It has put a button on the navigation toolbar which I can't remove by the usual drag and drop method customising toolbars. It has taken the place of my bookmarks button at the right hand side of the navigation toolbar.
Wšykne wótegrona (4)
I'm not familiar with the extension, and assuming that you do want the extension, did you check the options for the extension in the Add-ons Manager ("about:addons"), and the homepage listed for the add-on if you obtained it from addons.mozilla.org/
Wót David McRitchie změnjony
You can't remove it by drag and drop in customize toolbars because it is only for Firefox components, not 3rd party extensions.
I am sorry, either you need to un-install the extension using the Add-ons Manager or contact Freemake. You can also look out if you can disable that button by going to Add-ons manager and selecting Options button FOR Freemake extension.
@Swapnilrustagi
Not entirely true. Many extensions "drop" buttons in the Customize Palette, and the user can move toolbar buttons into there, too. Not a limitation of Firefox; if it won't "drag" into the Palette from a Toolbar, it's the fault of the individual extension being deficient. See the screenshot - almost all the buttons that are showing are from extensions that I installed. And if you look carefully you'll see that extensions can modify the Palette in ways beyond adding buttons to the Palette.
@the-edmeister, maybe, I am not as experienced as you. And nowadays I am using Opera. I am still on Mozilla support to help people who need support.
Maybe extensions can do that. But I think few (popular ones). Of course few from 6500+ extensions means some 500-800 extensions.