Manual:$wgBrowserFormatDetection

Details
Override ability of certain browsers to attempt to autodetect dataformats in pages. This is a default feature of many mobile browsers, but can have a lot of false positives, where for instance year ranges are confused with phone numbers. The default of this setting is to disable telephone number data detection. Set to  to fallback to browser defaults.

Output
If is not explicitly set to, the following line will be added to the HTML   section of all pages by :