Hey there! It's great that you're looking to open links in Firefox private browsing from Thunderbird. To do this, you can actually set up Thunderbird to use Firefox as your default browser. First, make sure Firefox is your default browser in your operating system's settings. Then, in Thunderbird, go to "Tools" > "Options" > "Attachments" > "Outgoing." Look for the option that says "Use Firefox" (or your default browser) to open links. Once you've set that up, when you click on links in emails, they should open in Firefox's private browsing mode. This way, you can enjoy safe and private browsing for charity donation sites like the Humane Society.

Thank you for your response. Unfortunately, I find no category titled "Options" in Thunderbird under tools. I have the latest version. Any help would be appreciated.

Info at this link: https://support.mozilla.org/en-US/kb/hyperlinks-in-messages-not-working

Usually, if you have checked the computer has Firefox set as default app and also opened Firefox and checked it is also set as default then the links should automatically work.

But if this fails then check the following:

• Settings > General
• scroll to bottom and clickon 'Config Editor'
• look for: network.protocol-handler.external-default or any other preference beginning with network.protocol-handler.warn-external.
• If they are set as 'false' then use the icon on right to toggle then to say 'True'

Please note: You will not find 'Options' because that was used a long time ago. The word 'Options' word got changed to 'Preferences' and in more recent versions has been changed to 'Settings'.

Also check: Settings > General scroll to 'Files & Attachments' section Under 'Content type' - if you see any mention of http or https then set 'Firefox' as default Action. But do not worry of you cannot see them as the settings mentioned above should work anyway.

I noticed you have said "I have the latest version" It would be helpful to state what version you are using as currently there are two versions in operation. Thunderbird is currently not auto updating to Supernova 115.1.0 - so you would have had to download and install that version. But if you had been using 102.13.1 then Thunderbird would have auto updated it to 102.14.0

In Thunderbird when you click on a link sent in any email, you do not have to use a right click (show options click) and choose option - it should auto open in default brower when you do a normal left click (action click).

However, please check the link really is correct before you click on it. When you hover over the link, you should see the real link shown in the Status bar - just a safety precaution.