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I want to increase the mouse wheel scroll speed in Google Chrome on Ubuntu 12.04.

I've read How can I change the mouse's wheel scroll rate?, I'm on Unity though, how can I edit the commandline for the Chrome icon in the starter bar?

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Does the command on the previous question work? like, do you need to just figure out how to edit the shortcut in unity? – Jorge Castro Apr 2 '12 at 20:10
I didn't test it, I just assumed it works. An answer pointing out how to set a system-wide "mouse wheel scrolls by X lines/px/..." option is also very welcome! – Felix Dombek Apr 3 '12 at 11:52
FWIW, here's a relevant search results page.… – Anderson Green Jan 13 '13 at 19:27
up vote 5 down vote accepted

The .desktop files you are looking for are stored in /usr/share/applications/

To change the mouse wheel speed open the .desktop file:
sudo gedit /usr/share/applications/google-chrome.desktop

and then go the 'Desktop Entry' section and look for following line (mine is on line 108):

and change it to (you can use any value you like instead of 150):
Exec=/opt/google/chrome/google-chrome --scroll-pixels=150 %U

Hint: if you use Chromium instead of Google Chrome, edit the chromium-browser.desktop file ;)

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I was looking for the same thing, and this worked for me! Thanks! – Get Off My Lawn Jan 28 '13 at 15:50
This method appears to be deprecated: link – Woltan Apr 26 '13 at 7:26

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