The rejectList and allowList contains the list of source-target rules. The main purpose of these lists is to provide an automated action on whether opening a new tab is allowed or not. Any matching rejectList rule will reject the new tab to open without prompting the user. Any matching allowList rule will allow the new tab to open without prompting the user.

rejectList has higher priority than allowList. Each source-target rule is an array of two values: SourceURL then TargetURL. SourceURL denotes the current tab's URL, while TargetURL denotes the new tab's URL.

Both source and target URL values can be either a string type or a regular expression object. Each will be compared against the whole URL.

If string type is used, it must match the whole URL instead of part of it. The comparison is done without case sensitivity (i.e. character case is ignored). A * wildcard can be used to match any one or more characters. e.g.:

"*" will match any URL.

"*://www.site.com/*" will match against http://www.site.com/ including http://www.site.com/home .

"www.site.com" will never match against http://www.site.com/ .

"*www.site.com*" will match against http://www.site.com/ but also against http://www.proxy.com/?url=http://www.site.com/ .

"*://*/*www.site.com*" will match against http://www.proxy.com/?url=http://www.site.com/ but not against http://www.site.com/ .

"*url=*www.site.com*" will match against http://www.proxy.com/?url=http://www.site.com/ but also against http://www.proxy.com/?url=http://www.other.com/&alt=http://www.site.com/ .

If regular expression object is used, it may match only part of the whole URL, depending on the regular expression pattern itself. The comparison is done with or without case sensitivity, depending on the regular expression flags.

A source-target rule will match if the source and target URLs matches.