Firefox Extension modifies webpage and makes it unusable

[Oceanwaves]

Hello,

I'm using Firefox 128 on Linux (SuSE Tumbleweed). I noticed problems when the Enpass Browser Extension for Firefox (Version 6.9.4.2) is active.

Example: Website https://www.geocaching.com (requires registration)

With the extension active I noticed several modifications of the page, some of them make it unusable.

Example 1:

Left picture: extension enabled, right picture: extension disabled

I clicked on the edit button (pencil) to edit the coordinates of a geocache. With the extension enabled nothing happens, when I click the button. With the extension disabled a windows pops up allowing me to enter other coordinates.

For some geocaches it is required to change the coordinates. As a can't do this with the extension enabled I can't save new coordinates for the geocache.

Example 2:

Left picture: extension enabled, right picture: extension disabled

To check new coordinates I can enter them in the field above and press "Check Solution". This requires to check "Ich bin kein Roboter" (I'm not a robot) for the reCAPTCHA. However, with the extension enabled I don't get the reCAPTCHA at all. Entering coordinates and pressing "Check Solution" with the extension enabled just leads to an error message "Recaptcha validation failed.". No chance to check the coordinates. With the extension disabled the CAPTCHA appears.

Example 3:

Left picture: extension enabled, right picture: extension disabled

With the extension enabled I have to click on "View all logs" to see the log entries. Firefox then loads the log page and I can see the logs, but have to use the Back button to get back to the cache. Without the extension log entries are visible at the end of the page.

 

Example 4:

Left picture: extension enabled, right picture: extension disabled

With the extension enabled I don't see the map with the location of the geocache. With the extension disabled Firefox loads a map.

All these problems only show up in Firefox, which is my main browser. In Chrome, the page loads without any problems although the Chrome extension is active.

Is there a way to tell the extension to not modify web pages (at least selected)? I haven't found an option in Firefox to disallow the extension to modify web pages.

Regards,

Oliver

 

Edited August 27, 2025 by Oceanwaves

[Amandeep Kumar]

I've reported this issue to the Enpass technical team. They are currently investigating it, and I will reach out to you with updates as soon as I receive them. 

Thank you for your patience, and feel free to provide any additional feedback. 

#SI-3936

[Oceanwaves]

Seems technical team is investigating the problem for more than 1 year now... Here is another website (https://app.tronity.io/dashboard) with a map that stopped working some days ago with the Enpass extension activated in Firefox 141.0.2. tronity.io is a website that records where my car is driving to and where I charged it.

With Enpass extension 6.11.5.2 disabled everything looks fine:

 

If I enable the Enpass extension the map is not shown anymore. I still can see that there are outgoing DNS requests for aps.hereapi.com, but the map is missing from the website:

 

The interesting thing is that on Vivaldi browser everything looks fine, even with the Enpass extension activated (I tried Enpass extension v6.11.5 and v6.11.6).

Would be nice if these modifications of websites in Firefox would be fixed.

Kind regards,

Oliver

Edited August 16, 2025 by Oceanwaves

[Amandeep Kumar]

Thank you for providing detailed information about the issue you encountered. 

I've escalated the matter to our technical team for investigation, and they are currently working on resolving it. I'll keep you updated on any progress or developments. 

[Tarun Singh Rawat]

@Oceanwaves
To help us better understand the issue, could you please provide the following details:

• Are you experiencing this problem only on Firefox, or does it occur on other Chromium-based browsers as well (such as Chrome, Brave, Edge, or Vivaldi)?

• If you're using any Chromium-based browsers, could you specifically check whether the issue is also reproducible on Google Chrome?

Your input will help us investigate this more effectively. Thank you!

[Oceanwaves]

The above problems with www.geocaching.com and tronity.io only occur in Firefox (currently using v141.0.2) with Enpass Extension v6.11.5.2 enabled. They disappear if I disable the Enpass extension.

In Chromium and Vivaldi both websites work without problems, even with Enpass extension (v6.11.6) enabled.

I don't have Chrome installed on my Linux system. I can download and install it if you want me to test Chrome, too.

Regards,

Oliver

[Amandeep Kumar]

Thanks for sharing the detailed info and version specifics, this will surely help our technical team investigate further. We appreciate you confirming the behavior across Firefox vs. Chromium/Vivaldi and the extension versions. If you notice any new errors or if updating the Firefox extension becomes possible, please let us know.

[Oceanwaves]

For the moment I disabled the Enpass extension in Firefox, so that I can use these websites. And after having read this article about security issues in actual browser extensions for password managers (including Enpass) I think I will leave it disabled until both issues are fixed.

Update: Looks like the mentioned security issues in the extension have been fixed in v6.11.6.2. Now still waiting for the websites to work...

Edited August 23, 2025 by Oceanwaves

[Amandeep Kumar]

Thank you for sharing your update. You’re correct, the security issues you mentioned have already been addressed in v6.11.6.2, so you can continue using the extension with confidence.

Regarding the issue with certain websites, our team is still working on improving compatibility, and we’ll release a fix in an upcoming update. We’ll make sure to keep this thread updated once it’s available.

We appreciate your patience and understanding.

[Tarun Singh Rawat]

Please update the Enpass browser extension for Firefox to the latest version and check if the issue persists.

[Oceanwaves]

I've updated to version 6.11.6.2 for Firefox. I can see the map on tronity.io again. But geocaching.com is still unusable. Without the options on the top green line I can't even open my account.

Here are two screenshots. The first was taken with Firefox extension 6.11.6.2 enabled, the second one without the Enpass extension.

[Tarun Singh Rawat]

Thank you for sharing the details.

We have forwarded the information to the tech team and will get back to you as soon as we have an update from them.

[Oceanwaves]

Just to let you know: with Enpass extension for Firefox 6.11.7.2 the map on tronity.io disappeared again . This was fixed in v6.11.6.2. See my above comment  dated August 27. I disabled the extension again...

[Tarun Singh Rawat]

Thank you for your response. I have notified the technical team and will keep you posted on any progress.

[Oceanwaves]

Update: Firefox Enpass extension is now v6.11.8.2. Map on tronity.io is still broken (was fixed in 6.11.6.2), geocaching.com is still broken and completely unusable with enabled extension.

[Oceanwaves]

Update: Firefox Enpass extension is now v6.11.9.2. Map on tronity.io is working and geocaching.com is also working! Thanks for this xmas present and I hope, future versions will not break these sites again.