My default Web browser is Firefox and default mail user agent is Thunderbird.
Firefox has been set to:
“Open new windows in a new tab instead”
Despite this, every time I click on a link in an email, a new Firefox window is opened. I do not know if this is a separate instance of Firefox, but I suspect that it is not. This behaviour of Thunderbird is new to me and I think some setting might need to be changed.
When a new link is clicked in the browser, however, it is opened in a new tab as expected.
What should I do to make all new links—whether clicked from browser or mail user agent—open in a new tab within an already open Firefox window?
Thanks.