Firefox should provide a plugin for XSLT after native XSLT is disabled.

[JimW]

It appears that removal of native XSLT support from Firefox is moving forward. 

I recommend that XSLT support in Firefox be continued by offering an XSLT extension for Firefox, just as Chrome is offering a plug-in (Polyfill) as a replacement for native XSLT support. 

I am experimenting with including Chrome polyfill script in my web pages to continue support for users with  Firefox browsers. I am concerned that using Polyfill scripts will reduce user privacy due to data collection by Google.    

[Jon]

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