I just set up a new computer last week, and installed the Add-on "Video DownloadHelper". It worked. I finally go around to adding the "Toolbar Buttons" Add-on, and now my "Video DownloadHelper" button is nowhere to be seen.

I've tried uninstalling and reinstalling the add-ons, but it doesn't help.

On my previous computer, the ""Video DownloadHelper" add disappeared too, so I was excited that it worked with the new computer. When it had disappeared on my old computer, I couldn't figure out why. However, now it seems to have coincided with installing "Toolbar Buttons".

Perhaps it is a coincidence, but it definitely seems like Toolbar Buttons made my "Video DownloadHelper" disappear.

Any ideas?