Web Compatibility Support • https://www.incavo.com/ https://ifm.com/sg/en navigation menu missing or does not work at all

For Incavo the menu isn't shown because z-index does not support calc; here's a userstyle workaround:
There's still a problem that the "PRODUCTS" item doesn't drop down its list. Of course, given the errors in the console there's probably a few more issues, as well.

For IFM use a Modify HTTP Response filter to add a polyfill.

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