Installing or Uninstalling a Zen Mod causes all Zen Mods to break !!

[Likhith904]

Captchas

• I have read the instructions.
• I have searched existing issues and avoided creating duplicates.
• I am not filing an enhancement request.

What happened?

before uninstalling a Zen Mod

after uninstalling a Zen Mod

Reproducible?

• I have checked that this issue cannot be reproduced on Mozilla Firefox.

Version

1.7.4b

What platform are you seeing the problem on?

Windows

Relevant log output if applicable

[Anoms12]

@Likhith904 please edit the name of this to Zen Mod instead of extension

[different55]

what exactly is breaking? it's not super clear from your screenshots

[Likhith904]

The UI of the sidebar and I also installed a Zen Mod called old navigation, it has changed see the navigation buttons so it is affecting other zen mods too..

[michaeldodge-FV]

Just to add some clarity, this seems to be the same thing as (or at least very similar to) the following issues:

• Mods #3600
• Installing mods overwrites all currently installed ones #4614

The description of #4614 wasn't entirely clear for me, but I eventually figured out what was being said. The problem is caused when you have more than one tab open to https://zen-browser.app/mods . If you have only one tab open there at a time, you can install mods without any issues. But if you have two or more tabs open to the mods site, they are competing with/overwriting each other.

Here's an example that's easy to reproduce. I'll choose a few mods that are very different and don't overlap in functionality at all, to make it obvious when they are applied/removed:

• In a fresh profile, with a single tab open, go to https://zen-browser.app/mods/477bc813-c333-4747-813e-00e0420ceec0/ (the Bottom Essentials mod) and install it.
• In the same tab, go to https://zen-browser.app/mods/906c6915-5677-48ff-9bfc-096a02a72379/ (Floating Status Bar mod) and install it.
  • Should have no problems seeing both of them working
• Now, leaving the first one open to that mod page, open a second tab, and go to https://zen-browser.app/mods/22c9ec3b-7c62-46ae-991f-c8fff5046829/ (Tab Numbers mod) and install it
  • This should have the effect of uninstalling the first two

I currently have 12 mods installed, by carefully ensuring I only have one mods tab open at a time, and I am nervous about installing any more unless I am very deliberate about following this one-tab rule.

Hopefully that helps isolate what is going on and leads to a fix. I LOVE what I am seeing so far with Zen. I'm a lifelong Firefox user, so happy to see this project keeping diversity in the browser space while truly innovating in ways that are long overdue!