Syntax quirks

• Filters match on word boundaries unless explicitly wildcarded
  • See https://github.com/uBlockOrigin/uBlock-issues/issues/954#issuecomment-602041890
• Looking-like-domain filters match only in domain part of URL
  • See HOST optimiztion
• Negated domains in cosmetic filters work like exception (In ABP generic blocking filter overrides filter with negated domain).
  • See https://github.com/uBlockOrigin/uBlock-issues/issues/388
• One filter can be counted as many, example
• $document works only as blocking filter
• Generic cosmetic filters don't work in Shadow DOM
  • See https://github.com/uBlockOrigin/uBlock-issues/issues/803
• Popup filters will not close pages opened by direct user action
  • See https://github.com/uBlockOrigin/uBlock-issues/issues/774
• Domain filter in uBO matches fully qualified domain name (FQDN, these with dot at the end), where in ABP match is exact.
  • See https://github.com/uBlockOrigin/uAssets/issues/7619