Adobe Flash Player ?

[4me2c]

If You are using the same OS,

You can Click the START Button, lower left corner, when it opens in the window just type an f and another smaller window will open... in that one click the left tab marked Storage and "Choose Wisely"...!

Under Updates You can check for Updates... and in Advanced You can Delete All... Delete Data.. Close the window... all infromation that sites have saved on Your sys will bee Deleted...!

[dishuser]

are you using mozilla 64 or 32?

[4me2c]

Version 58.0.2 (64-bit) Firefox is up to date, just Now checked by using the 3horizontial bars(Menu) in the browser heading and clicking the (Help) almost at the very bottom of the list...!

[4me2c]

Still Hangs Up quite often, have to go into Options and Clear cache and then Open Flash, Advanced and Clear All so I can continue uninterrupted...!