User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5b) Gecko/20030809 Mozilla Firebird/0.6.1+ Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5b) Gecko/20030809 Mozilla Firebird/0.6.1+ If the mouse driver is set to scroll the system one screen at a time, the Ctrl+mouse wheel function will have no effect. Alt+wheel and Shift+wheel work normally, as do the keyboard and menu shortcuts to zoom text. Setting the system to scroll any number of lines causes the ctrl+wheel shortcut to work. Using the latest Intellimouse driver (4.12) on Windows XP SP1. Reproducible: Always Steps to Reproduce: 1.In Windows Control Panel > Mouse > Wheel set to "Scroll one screen at a time" Actual Results: No effect when using Ctrl+wheel Expected Results: Text size changes with wheel rotation

If this is a driver setting, it is likely not passing the scroll "keypress" to the application, instead it is calling something else. Since the driver controls what signal the application receives, this would not be something within Mozilla. I would suggest contacting Microsoft technical support to report the problem. Perhaps Ctrl is not supported as a modifier within the MS driver? Marking INVALID for now, please contact support for the mouse and reopen this bug if they can give you information pointing to a problem with Mozilla.

It's not a driver bug. I've discovered the problem. If the mouse driver is set to scroll one screen and the mousewheel.with(alt|control|shift)key.sysnumlines pref is set to true, then neither the text zoom nor move through history special functions will work. Instead, the system "screen at a time" preference overrides the function and Mozilla 1.4/Firebird scroll the page instead of use the other functions. Setting the withXkey value to false causes these functions to work. Firebird defaults withshiftkey set to false, which is why moving through history works. It should also default to withcontrolkey set to false, as this will make ctrl+wheel work for all users. This is broken in both Mozilla 1.4 and Firebird. I'm new at this. Should I file a new bug against this for Mozilla or should this bug be retargeted?

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6b) Gecko/20031216 Firebird/0.7+ I was able to reproduce the bug. The shift and Alt functions with the mouse wheel retain their abilities, but Ctrl+wheel no longer changes text size.

Ctrl+rolling the mousewheel increases/decreases font-size in Deer Park alpha 2 rv:1.8b3 build 20050712 under XP Pro SP2. As rightly mentioned, the XP users must use this setting: Start/Settings/Control Panel/Mouse/Wheel tab/Roll the wheel one notch to scroll:/ The following number of lines at a time The Deer Park help viewer documentation (last updated on October 6th 2004) does not mention this issue regarding features triggered by modifiers (Alt/Shift/Ctrl + rolling wheel). The page Mouse Shortcuts http://www.mozilla.org/support/firefox/mouse does not either.

rsohal, Is this bug still occuring? You reported this for Firebird/0.6.1+ (and Mozilla 1.4) under XP Pro SP1. Over here, when using Firefox 2.0.0.11 under XP Pro SP2, I get the expected results. WFM. Please get back on this. Firefox 3 will be released in a few weeks, so we should check if this is occuring in a recent Minefield (rv:1.9b3) nightly build. Are you still using Intellimouse driver (4.12)? I use the default SP2 driver files issued/released by Microsoft for my logitech mouse.