*****USER BEWARE***** Unusable unless you don't need to use it. Your RAM usage will increase until full, drop down, then repeat, over & over with this extension enabled. In a system with over 200 Chrome Tabs Chrome was completely unusable, had to go into the Chrome `C:\Users\<YOURUSERNAME>\AppData\Local\Google\Chrome\User Data\Default\Extensions folder & delete the recently created folder to get into Chrome. On another system with only 30 Tabs I was able to scroll task manager but there'd be multiple minute pauses between when you scroll & when you see it scroll on the screen. It completely filled the 8GB of RAM on this system, then would drop back to only 1.5GB used, then fill up, over & over with no other programs running & only 30 tabs open.

As others have said, the extension isn't working as well as it used to. While I don't have the issue with it slowing down that others report, it appears to have stopped working with Google Docs. Since I work at an organization that relies on Google Docs this is less than optimal as I end up having the same document/spreadsheet/presentation open in multiple tabs and keep opening versions and new tabs.

思っていたのとは違ったので移行します。

Unfortunately, this extension no longer works as well as it used to. It used to be the best in its category, but now it has several issues. For example, the extension often fails to open, and I have to delete and reinstall it repeatedly just to get it to work. I've had to do this multiple times over the past few months.

Slows the new tabs to between 15 and 30 secs to open, unfortunately that makes it unusable for me. I like it other wise, but simply cant use due to the tab opening issue.

Earlier, it used to work flawlessly. Lately, it is pathetic - system freezes but still it is not preventing the duplicate tabs.

Works great but the plugin makes the browser extremely slow, opening new tabs take 3 seconds.

With lots of Tabs (150+) the browser come to a crawl when using this extension. Don't recommend until a fix for lots of tabs is introduced.

I love it when it works. But it doesn't do anything now so I have to uninstall it. Chrome has been lagging for me too. I wonder if it's this.

having the same issue as other users commented recently, chrome is freezing and stuck frequently.

Its amazing when its at work but I also experienced it freezing Chrome & drastically slowing it down. Have to keep turning the ext on & off when needed.