Mozilla support page causes SingleFile to display "This page cannot be saved with SingleFile"

[SteveS73]

Describe the bug
When I tried to save the following Mozilla Support page, the SingleFile icon displays a "stop" icon over the top of itself. Hovering the mouse over the icon displays "This page cannot be saved with SingleFile." https://support.mozilla.org/en-US/kb/remove-other-bookmarks-folder-from-bookmarks-toolbar#firefox:win10:fx84

To Reproduce
Steps to reproduce the behavior:

1. Go to https://support.mozilla.org/en-US/kb/remove-other-bookmarks-folder-from-bookmarks-toolbar#firefox:win10:fx84
2. Click on SingleFile add-on icon

Expected behavior
In the past I've always been able to save such support pages. Maybe it's due to a change by Mozilla?

Environment

• Win10 Pro 1909 64bit
• Browser: Firefox
• Version: 84.0.2 64 bit

[gildas-lormeau]

This is a known issue. Browser providers block content scripts of extensions on some domains they own. This can be fixed by removing support.mozilla.org from extensions.webextensions.restrictedDomains in the about:config page.

[zerobaka]

No use, even when i cleared the whole text from extensions.webextensions.restrictedDomains, after restarting firefox, singlefile still refused to save any pages started with this address "https://addons.mozilla.org/en-US/firefox/addon/". Any other tips, please?

[SteveS73]

Worked, Thanks!

[bansan85]

Just to found more easily this page, please found below the default list of restricted url in Firefox:

accounts-static.cdn.mozilla.net
accounts.firefox.com
addons.cdn.mozilla.net
addons.mozilla.org
api.accounts.firefox.com
content.cdn.mozilla.net
discovery.addons.mozilla.org
install.mozilla.org
oauth.accounts.firefox.com
profile.accounts.firefox.com
support.mozilla.org
sync.services.mozilla.com

[gildas-lormeau]

Thank you for the additional details. I converted the issue into a discussion thread to make it more visible, hopefully.

[iG8R]

Hello.
Is there some way to do the same but in Edge?
PS. I have plenty mht files and only Edge can open them so I want to save them with SingleFile.

[gildas-lormeau]

Sorry for the late reply. As far as I know, you cannot do the same in Chromium-based browsers.