[WebDriver] Add "webSocketUrl" capability

[whimboo]

This PR adds documentation for the webSocketUrl capability that is provided by the WebDriver BiDi specification.

[github-actions]

Preview URLs

• https://pr8824.content.dev.mdn.mozit.cloud/en-US/docs/Web/WebDriver/Capabilities/acceptInsecureCerts
• https://pr8824.content.dev.mdn.mozit.cloud/en-US/docs/Web/WebDriver/Capabilities/firefoxOptions
• https://pr8824.content.dev.mdn.mozit.cloud/en-US/docs/Web/WebDriver/Capabilities/webSocketUrl

Flaws

URL: /en-US/docs/Web/WebDriver/Capabilities/webSocketUrl
Title: webSocketUrl
on GitHub
Flaw count: 2

• broken_links:
  • Can't resolve /en-US/docs/Web/WebDriver/Commands/NewSession
  • Can't resolve /en-US/docs/Web/WebDriver/Commands/NewSession

---

URL: /en-US/docs/Web/WebDriver/Capabilities/acceptInsecureCerts
Title: acceptInsecureCerts
on GitHub
Flaw count: 3

• broken_links:
  • Can't resolve /en-US/docs/Web/WebDriver/Commands/NavigateTo
  • Can't resolve /en-US/docs/Web/WebDriver/Commands/NavigateTo
  • Can't resolve /en-US/docs/Web/WebDriver/Commands/NewSession

---

URL: /en-US/docs/Web/WebDriver/Capabilities/firefoxOptions
Title: firefoxOptions
on GitHub
Flaw count: 2

• broken_links:
  • Can't resolve /en-US/docs/Web/WebDriver/Commands/NewSession
  • Can't resolve /en-US/docs/Web/WebDriver/Commands/NewSession

External URLs

URL: /en-US/docs/Web/WebDriver/Capabilities/webSocketUrl
Title: webSocketUrl
on GitHub

• https://w3c.github.io/webdriver-bidi/ (2 times) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/WebDriver/Capabilities/acceptInsecureCerts
Title: acceptInsecureCerts
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/WebDriver/Capabilities/firefoxOptions
Title: firefoxOptions
on GitHub

• https://chromedriver.chromium.org/capabilities (1 time) (Note! This may be a new URL 👀)
• https://hacks.mozilla.org/2017/12/using-headless-mode-in-firefox/ (2 times) (Note! This may be a new URL 👀)
• https://searchfox.org/mozilla-central/source/modules/libpref/init/all.js (1 time) (Note! This may be a new URL 👀)

(this comment was updated 2021-09-14 18:44:29.178525)

[whimboo]

@jgraham mind checking if the content for webSocketUrl looks fine to you? Thanks.

[whimboo]

Please note that I will take care of the missing pages for WebDriver/Commands/NewSession and WebDriver/Commands/NavigateTo in the next days.

[jgraham]

This generally looks accurate and reasonable to me.

[whimboo]

@teoli2003 could you please review?

[whimboo]

I talked with @sideshowbarker on Element and he will take care of the final review and merge once the branches are open again. Thanks!