Error When Attempting To Install Specific Chrome Extension

[phrohdoh]

What happened?

undefined This add-on could not be installed because of a filesystem error.

When attempting to install the Chrome extension Internet Money, I receive this error and the extension is indeed not installed as far as I can tell:

I am running Waterfox 6.5.2 (64-bit) on macOS Sonoma (14.0).

Reproducible?

[Not Applicable]

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

Version

G6

What platform are you seeing the problem on?

macOS

Relevant log output

[Tell me which log(s) are relevant and where to find them, and I will happily share them]

[djeanql]

Also having this issue on Fedora Linux, no chrome extensions work. Also on 6.5.2.

[02Rusty]

Having the same issue on MacOS 15.0.1 Sequoia. Latest Release. Firefox extensions only work.

[myusername450]

this looks like it affects all chrome extensions

[GeoffreyTaucer]

having this same issue with all chrome extensions on windows 11

[artitrue]

Tried 3 latest versions (up to 6.5.3) and also G6.0.18 - on every version I get following error:

This add-on could not be installed because of a filesystem error

while trying to install Chrome extension from Chrome Web Store. Tried to install two different extensions, one of which is "Vue.js devtools (v5)" - https://chromewebstore.google.com/detail/vuejs-devtools-v5/hkddcnbhifppgmfgflgaelippbigjpjo

Also tried latest version (6.5.3 at the time of writing) on Ubuntu from flatpack and get the same error.

Fix this please. Chrome extensions support is one of the main "selling points" of Waterfox other Firefox (at least for me).

[artitrue]

May be it has been broken not by Waterfox update, but on the Chrome WebStore side. It has happened previously, according to this comment: https://www.reddit.com/r/waterfox/comments/tjoe5m/comment/i1swo2r/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

[gothickitty93]

I am also experiencing this issue with the latest version of Waterfox, 6.5.4, on macOS Sequoia

[e-ave]

Please fix. Also im on waterfox 6.5.4, macOS Sonoma

[ultradev-coder]

same here, im using waterfox 6.5.4 on linux mint 22.

[NiviDevs]

same here, im using waterfox 6.5.4 on windows 11. I really hope this gets fixed soon

[AshyDisaster]

doesn't work even if i import more certificates. worked before. fresh install with firefox sync on win10

[myusername450]

this still hasnt been fixed in 6.5.5

[usrw]

😔still there in G6.0.20 & 6.5.6

[wyteroze]

Also happening on 6.5.6 on Windows 11 Seems to be happening with all Chrome extensions

[TheCogster409]

Still happens with 6.5.7

[e-ave]

The issues Ive been having with waterfox keep increasing and there seems to be zero effort to fix them. Many times websites are completely broken. The cross browser plugins feature was the number one reason I installed waterfox and Ive had to go without it for the entire 2025. I'm done.

Just switched to Orion which natively supports firefox and chrome extensions, except it actually works (its in beta but it works). Orion is great on macOS/iOS, but does anyone know any other browsers that support chromium+firefox extensions? I still need a browser that works on windows/linux.

[TheCogster409]

Do you know of any browsers that actually support chrome extensions for windows? Orion seems nice but is only for apple products.

[e-ave]

Do you know of any browsers that actually support chrome extensions for windows? Orion seems nice but is only for apple products.

I couldnt find any besides Orion, but there are a LOT of browser forks out there so I feel like some of them must support it... maybe not. I also couldnt find a single browser that bothered to reverse engineer safaris extension formats. My only suggestion would be to try to look for common alternatives to waterfox and orion (or even forks, but with how bad waterfox is about bug fixes I doubt a smaller project would be any better). The good news is it appears Orion for linux is currently under development! I presume windows support would follow... https://www.omgubuntu.co.uk/2025/05/kagi-orion-browser-linux-port-uses-gtk4-libadwaita That also means it will go open source! https://github.com/OrionBrowser

[Makalipay]

The issues Ive been having with waterfox keep increasing and there seems to be zero effort to fix them. Many times websites are completely broken. The cross browser plugins feature was the number one reason I installed waterfox and Ive had to go without it for the entire 2025. I'm done.

Just switched to Orion which natively supports firefox and chrome extensions, except it actually works (its in beta but it works). Orion is great on macOS/iOS, but does anyone know any other browsers that support chromium+firefox extensions? I still need a browser that works on windows/linux.

--

Trying to force Blink engine extensions to work on a Gecko engine browser is a bit flaky?

Great! Thanks for this huge insight! Enjoy using any other browser that fulfills your niche requirement.

In any event, when browser devs say that the less extensions installed the lower the incidence of browser instability, most folks catch on pretty quickly.

I have uBlock origin & a handful of other quality of life xpi's in use.

I've found Waterfox to be performant, stable & privacy respecting on both Linux & Android.

Best regards

[e-ave]

The issues Ive been having with waterfox keep increasing and there seems to be zero effort to fix them. Many times websites are completely broken. The cross browser plugins feature was the number one reason I installed waterfox and Ive had to go without it for the entire 2025. I'm done. Just switched to Orion which natively supports firefox and chrome extensions, except it actually works (its in beta but it works). Orion is great on macOS/iOS, but does anyone know any other browsers that support chromium+firefox extensions? I still need a browser that works on windows/linux.

--

Trying to force Blink engine extensions to work on a Gecko engine browser is a bit flaky?

Great! Thanks for this huge insight! Enjoy using any other browser that fulfills your niche requirement.

In any event, when browser devs say that the less extensions installed the lower the incidence of browser instability, most folks catch on pretty quickly.

I have uBlock origin & a handful of other quality of life xpi's in use.

I've found Waterfox to be performant, stable & privacy respecting on both Linux & Android.

Best regards

It's performant but the bugs are piling up. It's been like 6 months where this major feature has not worked at all. This is a big selling point for people, at least for me. You don't have to have lots of extensions installed to want support for both. You might have just uBlock origin & one or two other extensions. But it's kind of a big deal to me when I've incorporated certain firefox or chrome specific extensions into my workflow and suddenly the chrome ones dont work on my new computer.

[Makalipay]

The issues Ive been having with waterfox keep increasing and there seems to be zero effort to fix them. Many times websites are completely broken. The cross browser plugins feature was the number one reason I installed waterfox and Ive had to go without it for the entire 2025. I'm done. Just switched to Orion which natively supports firefox and chrome extensions, except it actually works (its in beta but it works). Orion is great on macOS/iOS, but does anyone know any other browsers that support chromium+firefox extensions? I still need a browser that works on windows/linux.

--

Trying to force Blink engine extensions to work on a Gecko engine browser is a bit flaky?

Great! Thanks for this huge insight! Enjoy using any other browser that fulfills your niche requirement.

In any event, when browser devs say that the less extensions installed the lower the incidence of browser instability, most folks catch on pretty quickly.

I have uBlock origin & a handful of other quality of life xpi's in use.

I've found Waterfox to be performant, stable & privacy respecting on both Linux & Android.

Best regards

It's performant but the bugs are piling up. It's been like 6 months where this major feature has not worked at all. This is a big selling point for people, at least for me. You don't have to have lots of extensions installed to want support for both. You might have just uBlock origin & one or two other extensions. But it's kind of a big deal to me when I've incorporated certain firefox or chrome specific extensions into my workflow and suddenly the chrome ones dont work on my new computer.

At this point you're just repeating yourself.

[SavageTheUnicorn]

im sad this hasn't been fixed yet

[MrAlex94]

Hi all! I'm not sure at this point how much use this feature will have without significant engineering effort.

As it currently stands, the majority of extensions on the Chrome Web Store will be Manifest v3 and unfortunately they differ in a key way concerning the way they handle background tasks. Chromium opted for a Service Worker model and Gecko did Event pages.

Other APIs will have implementation parity but unless you're going for very basic extensions, I'm not sure how you could easily bridge that gap - which is what we'd have to do.

Even for Manifest v2 there were quite a few crucial changes - Firefox supported about 90% of the same APIs, but those last few made all the different and it's why you see so many popular chrome add-ons fail to install.

I'll see if there are ways we can maybe bridge the gap with pollyfills but don't hold your breath - it's quite the lift.

[TBX3D]

bumping this as it's been months without resolution