Worked perfectly for the first few weeks. I like that it reset the volume level between tabs so when I open a new tab it's not blasting my ears... But today it stopped working. Every time I open the volume bar again it is reset back to 0 and the volume doesn't change at all with the bar. I was loving it so I hope this can be fixed. Will change review if fixed. I am using Windows 11 with latest Firefox. Updated everything and not fixed.