Preferences dialog has two close buttons when opened from the "Unable to open your editor" window

[dennis-benzinger]

When you open the preferences dialog from the "Unable to open your editor" window it has two close buttons. I think one of them can be removed. AFAIK they do the same.

[docwhat]

What OS are you using? There is all kinds of hackery to make the dialogs behave the same on OSX, Windows, and Linux... it's rather annoying.

I haven't gone back to revisit the docs for them to see if this changed in a (more) recent Firefox version.

It's the problem of having an extension written way back for Firefox 3.x living in the age of Firefox 35.