The event_rules manifest property provides a mechanism to add rules that intercept, block, or
modify web requests in-flight using declarativeWebRequest or take actions depending on the
content of a page, without requiring permission to read the page's content using
declarativeContent.
Translating rules from javascript to manifest
The following defines a rule to display a page action if the current page has a video css tag in
javascript:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2015-06-12 UTC."],[],[]]