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Letter to Mr. Gustav Ekerot on 2023-02-24


Dear Mr. Ekerot,

I am Sunghyun — The one who sent you 10s of emails since the early days of tabExtend. I hope you are doing well. It's been a long time since we last spoke, and I'm reaching out to see how you've been doing.

I wanted to let you know that I recently changed my email address from to If you need to reach me, please use this new email address.

Also, I've been keeping a research journal on these days. It's a convenient platform for me to organize my thoughts and ideas. If you're interested, feel free to check it out.

I have a question about your extension, tabExtend. I recently switched to Firefox and noticed the extension is unavailable on the Firefox Add-ons Store. Do you have any plans to add it? As far as I know, Firefox can "straight up" run Chrome extensions, so I imagine uploading it to the Firefox Add-ons Store wouldn't take long. It would take a maximum of 10 minutes.

Please let me know your thoughts on this. I appreciate your time and hope that you are doing well.

Best Regards, Sunghyun Cho


  • Got a positive reply.
  • Current works: tabOS

Cloud-native Video Editor


Dear Mr. Ekerot,

Wow, I have not heard of such things. Jitter looks precisely like what I was looking for. I'll take a closer look later and update the website.

tabOS looks way cleaner, and I like the interface a lot. I used it for a couple of minutes, and some first thoughts:

  • Love the double-click interface. It does feel like an OS. If I were using a Chromebook, this is the first extension I would install.
  • Animation are way more fluid and polished, pushing further from the already-masterpiece tabExtend.
  • That being said, some of the space does seem redundant and may be utilized better. For example, the lack of Kanban like tabExtend is a huge dealbreaker for me.
  • Finally, I would like the possibility of tabExtend or tabOS coming to FF 🔥🦊 ❤🔥

That said, you made me have a shower-thought if there was "One and Only WebExtension" for Firefox and Safari. It will essentially be a VM of Chrome Extensions — This One and Only WebExtension will install Chrome Extension within itself and proxy all of the requests to Safari & FF. Ultimately it will bring the entire Chrome Extension Library to Firefox and Safari. Maybe I'll build it one day and paywall it to install more than 5 extensions or so. 🤣

Anyways. Your teams always inspire me, given how small, fast, and powerful you are. I hope you keep up your great work!

Best Regards,
Sunghyun Cho