I have been using Thunderbird for the past 15 years and compose messages in HTML with external links, using graphics. I have always used the dropdown Link dialogue box from the Formatting Toolbar. I just recently installed the version 78.2.0 - fresh install on a new Windows 10 system. I have no extensions or add-ons installed. Now, when composing an email, and trying to insert a hyperlink on a graphic, the web site address is not being saved. Instead, it reverts to mailbox:///C:/Users/Owner/AppData/Roaming/Thunderbird/Profiles/vfsud4rl.default/Mail/xxxxxxxx/Drafts?number=13 Have been able to get the link to 'stick' by using the Insert Link, clicking OK, then immediately repeating those steps a second time, which then brings up a different dialogue box titled Link Properties, (Mixed Selection). There has to be a simpler way to do this but the solution is eluding me. Inserting a hyperlink onto plain text from the same dialogue box works. Thank you, in advance, for any assistance you can provide.