Obsolete in latest upgrades Rated 1 out of 5 stars
Unfortunately, I can confirm the "lock browser" behaviour when trying to manage the engines.
Apart from that, the addon general behaviour is erratic, which is a pity, since I found Foobar a great and indispensable addon for many years.
Please, please, someone fixes it =D
Until then, I think it's better to avoid it, sadly.