On Firefox, Windows-Linux migration and open all in tabs

Everyone that know me know that I'm a fervent Firefox-user. I organized my bookmarks neatly in subfolders in my bookmarks-toolbar. I also regularly backup my firefox profile and it turns out that it it is highly transportable between Windows and Linux. It's a great manner to migrate someone from Windows to Linux: let him/her install thunderbird and firefox and let these packages migrate all the mail settings and favorites from Outlook and Internet Exploder (ehm, sorry, I mean Internet Explorer). Then backup the profiles (somewhere in c:\Documents and Settings\\Local Settings\Application Data if I recollect correctly) by zipping these folders. After the installation of your prefered taste of Linux and (if not pre installed) the installation of Thunderbird and Firefox you simply unzip your Firefox and Thunderbrid profiles in the respective .mozilla-firefox and .thunderbird folders in your home folder. Start the applications and all the settings are there!

I had one small annoyance in Firefox though. And that is that in Firefox I have a subfolder for my webmail-links and one for my news-links. When I right-click on my webmail-links I choose "open all in tabs" and I get all my webmail sites opened. Really time saving. When I do the same with my news-links my webmail-pages tabs get replaced!
It turns out after a little googling that there is a setting in about:config (type "about:config" in your address-field) that solves this.
It's the parameter: browser.tabs.loadFolderAndReplace that needs to be set to false. You can do this by simply double-clicking on the parameter.
See for example (amongst others): http://mozillalinks.org/wp/2007/03/prevent-firefox-from-overwriting-your-tabs/