Firefox for Android Support Forum

Samsung Galaxy S24 Ultra running latest Android update and latest Firefox update. I set Firefox as my default browser. I have un-installed all updates for Samsung Internet and removed all permissions for it. Disabling it is greyed out. Some apps that I use have links to websites. Too frequently, when I go to one of those links, the intro screen for Samsung Internet opens. Then, when I look at the settings in Firefox it is no longer set as the default. Then I set Firefox to default and go to my phone settings to see that Firefox is selected as the default. If I open the previously mentioned app and choose the web link, Firefox will open. But somewhere along the way, the default changes back to Samsung Internet and it's a vicious circle. I have posted in a Samsung forum but haven't gotten a reply that solved the problem. Please help. Thanks Mike

I've had no issues with Firefox Sync on desktop but frequent issues on Android.

I've reported issues previously here: https://bugzilla.mozilla.org/show_bug.cgi?id=1879003

Yesterday, it failed in a different way, announcing that I needed to sign into Sync. I've tried a dozen times yesterday and today using both QR scan and email confirmation. All fail in various ways. For example:

• After scanning QR code: "500 Error Oh dear, something went wrong there"
• After scanning QR code: "Pairing not successful. Error while creating the pairing channel"
• After scanning QR code and approving on mobile device and desktop, desktop says success, but phone stays on "Approval now required from your other device" Interestingly this page isn't open in the normal browser. If I click the three dot menu, it says "POWERED BY FIREFOX, Open in Firefox"
• After going through all the steps and it saying "You're signed into Firefox," yet when I go to share a tab, it asked me to sign in.

Any tips on getting Firefox Sync to work? I don't see any troubleshooting sections in the online help articles.

I'm developing an android app that uses the OAuth2.0 auth code flow to authenticate users. The app launches a CustomTab which in turn, responds with a redirect to the app's redirect scheme. Chrome redirects immediately, closing the CustomTab. Firefox does nothing regardless of the state of the "Open in app" setting.

In order to reproduce this: 1. Create an android app with a redirect scheme 2. Create a webserver that simply redirects to that scheme 3. From the app, open a CustomTab to the webserver 4. Observe the CustomTab not redirect

For a more concrete example, I can reliably reproduce using the sample app from https://github.com/kalinjul/kotlin-multiplatform-oidc and an [Authentik](https://goauthentik.io/) server but I'm sure something like Auth0 would have the same problem.