No, even at Microsoft. It won't be at the level of "the support for this app will work for firefox on linux" but it will be setting policy like "By default all

No, even at Microsoft. It won't be at the level of "the support for this app will work for firefox on linux" but it will be setting policy like "By default all Microsoft websites will support browsers x/y/z on platforms p/q/r/s, unless exempted by the relevant VP with supporting business case" etc.