Tracking the implementation of MathML in the wild
|Firefox||Currently the most feature-rich implementation of MathML.|
|Opera||Only interested in implementing MathML for CSS.|
Content MathML should not be used and it is not going to be implemented by browser vendors. Any implementation of MathML should implement Presentation MathML. Firefox made sure that the Gecko engine does not corrupt copy-paste operations that contain Content MathML alternatives.