This is always what will appear if someone updates to version 128, but it will not appear again if you stay on version 128.

Your description does not have quite enough information to understand why you are seeing this. Are you attempting to stay on version 115, you are updated to 128, you see that web page, and then reinstall 115? If so, which specific version of 115?

If that isn't accurate then please explain exactly your process.

Thanks.

Version 134.0.2

I'm trying to use Version 102 or before.

This problem with Firefox began with an automatic upgrade i didn't want. I have been disabling all auto upgrades until more recent versions where this is more difficult to do.

I own this machine and it's ok if I don't want changes as long as I'm happy, AND shouldn't be nuisanced with this kind of crap penalizing me for refusing to update.

Bring back the ability to check a box disabling upgrades.

Ive reinstalled may times and many versions and nothing now prevents this page from coming up in my browser. I've been using Thunderbird a lot less and been looking at other clients because of the new "features" in the new versions along with being penalized for refusing and have it intrude on my browser.

Regarding https://www.thunderbird.net/en-US/thunderbird/128.0/whatsnew/?locale=en-US&version=128.6.1&channel=esr&oldversion=102.8.0 ....

• It should not be showing while you are using version 102.
• But if it is showing repeatedly, a) I don't know of a way to stop it b) any fix we might have for that will only be available in version 128 or 140 (in the next couple weeks).

Regarding updates, if it prompts repeatedly for updates, if you don't click to update then it should not do so. To get better help about an update issue, please post a new question https://support.mozilla.org/en-US/questions/new/thunderbird and mention updates in the title.

Of course it "shouldn't" be causing a browser window to open at all. No matter which version is installed. This started when I tried to downgrade back to my old version from an auto upgrade. Tried latest versions and haven't liked ANY of them!

Auto updates is at the root of the problem. The fact that the option not to update ever, is not an option at all, is where this started. I tried to keep my old version but auto update kept upgrading. It changed my settings early on, then the option not to update at all was deleted. Its no accident! Its programmed to force updates on the customer who doesn't want them AND penalize us if we try to prevent them. The new versions are totally unnecessary and offer only cosmetics, bells, and whistles.

Having this page/tab open in the browser when Thunderbird opens is just plain DIRTY POOL, bad practice, and makes your crew look shady, crooked.

There are those of us who like the older versions.

New versions need the option not to update, ever. Needed is the option turn off auto updates, and leave them off, put back in, and not be badgered about it!!!

Question is how to permanently stop Thunderbird, of any version, from opening this ad, or any browser window or tab, on program startup!?

Please remember that Thunderbird is FREE. Being free, there is a need to ask for donations. For example, seeing ads on TV is the price people pay for not paying to watch a particular show. You can turn off the startup message at settings>general. If you want to be sure that you never upgrade (not recommended), see this post I did last year: https://support.mozilla.org/en-US/questions/1438626 I will close by reminding you that this is a peer group, not a place for the venom in you post.

Take a look at the page that opens. At no point does it ask for donations. It is an ad for Nebula. No matter what version of Thunderbird I install now, this page is opened. How to stop this?

The "venom" you speak of is truth!

Thank you for the instruction on stopping all upgrades.

The method of opening information within Thunderbird. is not going to change.

As you stated earlier, the core of your issue is updating at all. The solution previously stated is https://support.mozilla.org/en-US/questions/1438626. If that is not working then please file a bug report.

Having trouble explaining this.

Understood and good that you can open browser links from within Thunderbird.

The problem I'm having is whenever I first start Thunderbird, the aforementioned page comes up in my browser. (If the default browser is not open, it will open it to this page.) This is at the same time Thunderbird is opening.

It does this Each time, Every time.

This started when I downgraded to version 102 or older, after an unwanted auto upgrade. Now no matter which version I reinstall, this page still comes up. Installing the latest version doesn't get rid of it either.

Thanks for clarifying.

So after downgrading from version 128 to version 102, every startup of Thunderbird opens This exact url https://www.thunderbird.net/en-US/thunderbird/128.0/whatsnew/?locale=en-US&version=128.6.1&channel=esr&oldversion=102.8.0 ?

Correct.

So if you upgrade to version 141.0, you get this window popup every time you open it, even though your in the latest version.

The url it opens is: https://updates.thunderbird.net/en-US/thunderbird/140.0/whatsnew/?locale=en-US&version=140.1.0&channel=esr&oldversion=45.4.0

Please fix this asap

This started with an unwanted auto upgrade from version 102 to version 128. I had the version I wanted to keep already and did not need, or want, an upgrade. None of the new "features" were wanted. Most were cosmetic and not needed. The version I had was working fine until the auto upgrade took it to version 128 and this page opening problem. Downgrading did not get rid of the problem.

So, NO, I don't want to install version 140 or any other past 102.

Having a browser page open by starting this program is not a good thing! Not being able to easily stop it is worse yet.

Needed by companies using Thunderbird, and wanted by many users, is the option in its settings not to upgrade instead of having to hack. This was a choice in older versions. It needs to be put back.