What's New Page for Thunderbird Monthly Releases missing from website

[judecooks]

When Thunderbird Monthly upgrades, it opens a What's New page like this one:

https://www.thunderbird.net/en-US/thunderbird/135.0/whatsnew/?locale=en-US&version=135.0&channel=release&oldversion=134.0

This page goes to a custom 404 message indicating the page does not exist. We need to build out the What's New for the new monthly channel releases.

[Sancus]

These aren't supposed to be opening What's New pages at all.

[Sancus]

@coreycb Do we have a bug open for this behaviour?

[coreycb]

@Sancus I don't think we have a bug open for this.

@judecooks Can you help me understand how to reproduce this? Where did you install from? What operating system are you running on?

When I upgraded from 134.0 to 135.0, a tab opened for:

https://start.thunderbird.net/en-US/monthly/?uri=/thunderbird/start/&locale=en-US&version=135.0&channel=release&os=Linux&buildid=20250131225331

[orangesunny]

I have a similar issue. After upgrading to the latest stable version, I get a website opened as follows:

link: https://www.thunderbird.net/en/thunderbird/135.0/whatsnew/?locale=en&version=135.0&channel=release&oldversion=134.0

screenshot:

Version: 135.0 (aarch64), originally installed through https://formulae.brew.sh/cask/thunderbird, updated lastly through the app itself, sometimes before through brew. Happened with the previous upgrade 133->134 as well.

[coreycb]

Thanks for the additional information. It looks like brew pulls directly from our cdn artifacts so I'm guessing this is a bug in our builds.

[coreycb]

I opened a bug at https://bugzilla.mozilla.org/show_bug.cgi?id=1946534

[coreycb]

Can you check and see if your mailnews.start_page.override_url preference is set? In my case it's not, but I assume it is set to something like the what's new URL in your case. Settings->Config Editor and paste mailnews.start_page.override_url into the search.

[coreycb]

I'm sorry, it does in fact open a what's new browser link for me on Linux as well. I was looking for tab in Thunderbird. So that's good, I can recreate and will work on a fix.

[orangesunny]

Thanks for the additional information. It looks like brew pulls directly from our cdn artifacts so I'm guessing this is a bug in our builds.

Yes, it seems to be a bug in the builds as my two latest updates were definitely through the app itself, and it was showing correct post-update pages in my default browser (FF 😃) a few versions before (at least for the last year).

Can you check and see if your mailnews.start_page.override_url preference is set? In my case it's not, but I assume it is set to something like the what's new URL in your case. Settings->Config Editor and paste mailnews.start_page.override_url into the search.

I have no value for this set.