User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040626 Firefox/0.9.1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040626 Firefox/0.9.1 if i click a link in a message while i have internet explorer open, the link opens in the open internet explorer window. if ie is not open, it launches a new firefox window. firefox is my default browser. if internet explorer is not open, a new firefox window is launched and the link opened there. Reproducible: Always Steps to Reproduce: 1. open a page in internet explorer 2. open a page in firefox 3. click on a link in thunderbird Actual Results: link opened in internet explorer Expected Results: link opened in firefox as it's my default browser also, (probably not related) thunderbird used to open links in the existing firefox window if firefox was already running.. now it opens a new window. this is annoying and possibly a regression.

*** Bug 254089 has been marked as a duplicate of this bug. ***

See also bug 234117.

I see very much the same symptom. My default browser is Opera. If I have Opera and some other browser running, that browser (usually?) gets the link. If I have Opera and IE and Mozilla running, I don't see a particular pattern on which gets the link -- it seems, perhaps, to be the browser most recently started -- usually on my machine, Opera gets started early and stays up for a long time, whereas the other browsers are opened intermittently for testing. Note: bug 234117 has been duped to bug 263546.

I also see this on OS X, but with Sunbird (0.2a) running instead. If Firefox is closed and Sunbird is open when I click on a link, Sunbird becomes active and pops up a window with the following error: XML Parsing Error: undefined entity Location: chrome://browser/content/browser.xul Line Number 20, Column 1: <window id="main-window" ^ <command id="cmd_delete" ----^ If both Firefox and Sunbird are closed, then Firefox starts and opens the link correctly.

For the browser case, I think I've found the fix: I had the "Use DDE" option set for Windows' HTTP handling -- which was configured to use Mozilla, even tho my default browser was Opera7.5, and yet still links were opening in IE or Opera6. After turning that setting off, TB appears to always be opening links in the correct browser. See bug 265008 comment 3.

Paul Stanton, Andrew Self: did comment 5 help solve this for you?

no, i looked for the setting your talking about (on my xp machine) and couldn't find it. if you can give instructions i'll re-test on my 2k machine. i do agree it SOUNDS like a windows problem and not a browser problem.

I am running Windows ME and Firefox is my default web browser. When I click on a link in an e-mail message, it ALWAYS opens IE regardless of what else I have open. Please fix. I use your products so I don't HAVE to use Microsoft products.:)

Using Fedora Core 3. To verify part of the description, cliking on a link in a message while I have firefox running will open a new firefox window. This is despite the fact that my firefox settings include Advanced->Tabbed Browsing->Open links from other applications in:() a new window (*) a new tab in the most recent window () the most recent tab/window It's disconcerting that Thunderbird cannot interact correctly with Firefox.

I agree Peter B. West, my problem is exacerbated by the fact that I have multiple workspaces. Thunderbird uses the last tab of the last browser I loaded a page in. With 8 workspaces and no indication of which browser it used I have to search around for the page I wanted to see.

(In reply to comment #10) > Thunderbird uses the last tab of the last browser Thunderbird has no means of picking which tab or window gets used. As far as I know, Firefox does not provide a means of specifying the specific target for a link arriving from another application, either via the command line or via Windows' DDE; nor does any other browser. *THIS* bug is about opening the link in an unexpected PROGRAM, not in an an unexpected WINDOW (or TAB).

*** Bug 337023 has been marked as a duplicate of this bug. ***

Mike, anyone, do you still see this?

Yes, I just reproduced it with Gecko/20080809031127 Shredder/3.0b1pre Opera 9.5, my default browser, was opened early in the current session. I opened Firefox 3, then clicked the link in the bugmail, and the link opened in Firefox. I opened a link from SecureCRT and it opened in Opera. I pasted a link into Start | Run in Windows and it opened in Opera.

Not reproduced. I had only Chrome running (not my default browser). Clicking a link in TB opened it in Firefox. Please re-test. Thunderbird 45.8.0 Windows 7 64-bit

i guess it's fixed then! yay! 13 years later.