with the Seamonkey browser suite V2.x on GNU/Linux.
in several ways.
1) random crashes of browser, even with only 1 tab open it will just crash when clicking a link on a website.
2) message BARS. web pages jump around enough with the delayed display of dynamic content, there is zero reason the browser should aggravate this by throwing message bars across the top of the view pane.
3) ( the worst yet ) Terminate and Stay Resident. Sorry, but NO ONE wants to have the system lose resources with that type of stupidity. and it can’t be more obvious than check your email, clear the inbox so no unread messages, close the browser suite down completely and 8 HOURS later open it to find that Seamonkey has been CHECKING EMAIL while it should have been SHUT DOWN.