Broken references in WebDriver

[dontcallmedom-bot]

While crawling WebDriver, the following links to other specifications were detected as pointing to non-existing anchors:

• [ ] https://drafts.csswg.org/css-box/#visibility-prop
• [ ] https://html.spec.whatwg.org/#joint-session-history
• [ ] https://html.spec.whatwg.org/#nested-navigable
• [ ] https://html.spec.whatwg.org/#concept-output-mode
• [ ] https://html.spec.whatwg.org/multipage/dom.html#an-overridden-reload

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}