The vast majority of videos play like it's not even installed. Practically useless.

It doesn't work at all

Not working on sites I use - videos just start to play automatically and are not getting blocked.

The same here it doesn't work.
Tested with Firefox 56.0 on Youtube and Allocine, no effect at all…
But I see it's not updated any more so maybe it was used to works before with earlier version of Firefox.

does not work on the website http://www.gazeta.pl/0,0.html

Does not work on some major sites like Facebook and the Huffington Post. There needs to be a feedback mechanism that can help users of the app notify its programmers when this add-on does not work properly on a site.

good!

This app is great idea, but that's it, a great idea. The problem? It simply allows to much flash content to get by, and after all isn't that the point in the first place?

Nao funciona no facebook.

doesn't work

Like other victims of the "Post-57 Experience," I've been scrambling to find like replacements for the few extensions I had (running FF-Windows).

I had Flash Block. Now I'm using Flash Block Plus. It works about as well as its predecessor at blocking flash, though it doesn't seem quite as adept with ads as it used to be. (The only bad news here is that FF now has pretty much the same flash blocking capability, which makes FB+ a little bit redundant.)

What I really, REALLY miss is that with the original Flash Block, upon right-clicking a flash frame, you were offered the option to Copy Flash Location. That was invaluable to me for the ability to run things like games full-screen (where the server would allow it). This feature now seems completely absent, and I miss it dearly. Can that functionality be restored? Or is there somewhere else in the extension that I just haven't found yet?

I absolutely loathe the idea of having to dig into the page's source code or page info to try and find the flash's link. I really don't know what I'm doing, and the process is cumbersome at best.

If this feature got re-added, I'd sing the praises of Flash Block Plus from the rooftops.

I don't think it has blocked a single video. Very sadly, Flashstopper actually worked but is incompatible with 57. FF Quantum is great, but it broke all the add-ons, thus making it a very frustrating experience. I think it's time to install Chrome until FF add-ons catch up. This particular add-on seems to do nothing.

Does not work, and the few times it does, it's inconsistent!

It only works on a few sites, and not consistently on those. It's a real piece of crap. Not worth the trouble of installing.

Fascinante ⭐⭐⭐⭐⭐

Doesn't work like old flash block before vers 57 upgrade

It does not work on any Web-Page. I does not work on Youtube and many other pages. I tested with Firefox Qunatum 57.0 64 bit and Windows 7 64 bit. My old AddOn "FlashStopper" works fine. Please make it better, fix it, it is horrible. My name is Mark.

It used to do a good job, now it will not prevent flash from playing on at least two sites, Yahoo finance and Fox News.

Simply put, it does NOT work on all sites. Good case in point is www.aol.com. It does not stop any flash video content from starting up the minute I hit the home page for AOL. I've reviewed the video for using it and also read the instructions and FAQs. But it simply does not work on AOL no matter that the URL list is totally blank. And AOL is not the only site where I've had this problem with Flash Block (Plus).
Fortunately the older competing add-on, Flashblock, does work on ALL websites even if it is a legacy product.

Even though youtube claims that it is set to always use html5, the plugin will not let any youtube videos play. And there is no way to enable them without completely disabling the plugin