The recommended way to install user styles is to use Firefox with Stylish.
If you already have Firefox with Stylish, make sure this site is allowed to run JavaScript.
You've installed this user style in Stylish. To uninstall it, open the Tools menu, choose Add-ons, click the User Styles panel on the top, click on the entry for this user style, and click Uninstall.
You've installed this user style in Stylish. To uninstall it, open the Tools menu, choose Stylish, and remove the entry from there.
You've installed this user style in Stylish. To uninstall it, click the wrench icon, Extensions, click Options beside the entry for Stylish, and click delete for the appropriate entry.
You've installed this user style in Stylish, but a newer version is available.
To uninstall this user style, open the Tools menu, choose Add-ons, click the User Styles panel on the top, click on the entry for this user style, and click Uninstall.
The recommended way to install this user style is to .
The the minimalist Helvetireader style from http://www.helvetireader.com/ . See that site for screenshots and further information. Note that since the CSS has been copied into this style, you will not automatically get updates from helvetireader.com.
NB I didn't come up with this - see http://hicksdesign.co.uk/journal/heres-helvetireader . You can piece together the information required from the site above; I just thought it was worth sharing via userstyles to save other people doing the same.
Works for google.com and google.co.uk, you may need to edit this for use in other regions. [Feb 11th] Updated to latest CSS, just a few !importants added. Updates to Helvetireader are posted on http://twitter.com/helvetireader, I usually update this userstyle a day or two later and post to http://twitter.com/bazzargh