Works like a charm Rated 5 out of 5 stars

Initially I had the same problem as fgilbert, my folder was named "Unerwünscht". The solution Alex Cabal suggested was to go to
Account Settings -> [Account] -> Junk Settings -> Destination and Retention
and set Thunderbird to move new junk messages to the folder in question. Now it works exactly as advertised. Thanks again!

Rated 5 out of 5 stars

This is what I needed! Thanks!

Just does what it says it does Rated 5 out of 5 stars

I had to fiddle with the preferences because my french provider does not put spam in a standard folder (folder named "QUARANTAINE"), and TB didn't identify it as a spam folder.
Alex Cabal was kind enough to help me solve this issue.
And since then, spam sorted there by server side filters is automatically marked as read and does not require my attention anymore.

Does Exactly What It Says Rated 5 out of 5 stars

And very useful it is, as well: prevents constant distraction as the junk folders fill up. Thank you.

Excellent Rated 5 out of 5 stars

Great add-on. Works as expected and designed. I have several computers with Thunderbird on each. I'll ensure this is on each.

Now, if only Mr. Cabal could write one for trash - that would be an excellent addition!

Thanks Again!

Finally available!! Rated 5 out of 5 stars

Yes, finally such an add-on is available! People have been waiting for more than 3 years!

"Mark Junk Read" does exactly what it is supposed to do and works great. Thanks to the developer!

Sounds good... but! Rated 5 out of 5 stars

At first this sounded good... not being bothered by bold, unread messages in the Folder pane. But then I recalled that occasionally I get important emails that for some reason go into this folder and I rely on the bold type to remind me to review this folder. Were I to not be reminded by this, then I suspect that I would be too busy to remember to go into this folder and reclassify important emails as "Not Spam" or "Not Junk". Thank you for your kind work, but I'll pass, as I like to know what's going in to my folders when Thunderbird does this.

EDIT: My sincere apologies to the developer. He is absolutely correct about the functionality of the product, and I deeply apologize for allowing my opinion to cloud the truth.

That's a fine sentiment, but did you *really* have to rate it one star because it does exactly what it says on the tin?