A few examples

[mik]

A few examples just entered after installation of this extension:

1. disable marquee on all pages

{"name":"disable
marquee","urlRegex":"^","urlExcludeRegex":"","enabled":true,"preserveDocWrite":true,"css":"marquee
{overflow: visible !important;}","html":"","js":"","filters":[]}

The following rules a GMail specific (can be combined into one):

2. use fixed font in plain-text messages (also for composing)

{"name":"gmail: fixed font in messages","urlRegex":"^https?://
mail.google.com","urlExcludeRegex":"","enabled":true,"preserveDocWrite":true,"css":"textarea.Ak,
div.ii.gt {\n \u0020 \u0020font-family: monospace !important;\n \u0020
\u0020font-size: 9pt !important;\n}\n","html":"","js":"","filters":[]}

3. hide chat alert about being hidden

{"name":"gmail: hide chat alert about being
hidden","urlRegex":"^https?://
mail.google.com","urlExcludeRegex":"","enabled":true,"preserveDocWrite":true,"css":"div.nH.pp.ps.TZ
div.ul {\n \u0020 \u0020display: none !important;\n}
\n","html":"","js":"","filters":[]}

4. hide invite box

{"name":"gmail: hide invite box","urlRegex":"^https?://
mail.google.com","urlExcludeRegex":"","enabled":true,"preserveDocWrite":true,"css":"div.nH.pp.ps.TZ
div.nH.pY {\n \u0020 \u0020display: none !important;\n}
\n","html":"","js":"","filters":[]}