* add 4.0 migration guide

* fix linting issues

* add migration guide to all language’s sidebars

* add dropping cjsx support to 4.0 migration guide

* update reference to new mocha version

* improve spy/stub reset change description and add example

* fix location of spy/stub item

* fix lint errors

* fix one more lint error

* add migration-guide to pt-br.yml

* fix link to migration guide mocha section

* Remove our own reasoning - Node reaching end of life is enough

* State we're supporting 8+ more explicitly going forward.

* Add base 4.0.0 changelog

* Add better formatting to Migration Guide - before/after sections + smaller headings

* Add isFinite assertion, supported in Chai 4+

* fix eslint error

* Add 'migration guide' title for russian pages

* add edge to the list of browsers (#2416)

* add edge to the list of browsers

* Add edge to launching-browsers list / remove 'new' mention (this will become outdated)

Co-authored-by: Jennifer Shehane <shehane.jennifer@gmail.com>

* Firefox Support Docs (#2225)

* Initial commits for Firefox support

* Add 'isBrowser' and 'isBrowserType' to docs (introduced in Firefox PR)

* packagelock

* Remove 'firefox support' from roadmap + tradoff of no cross browser support

* Add notes about chromeWebSecurity only working in Chrome family browsers.

* add cross-browser guide

* Add 'cross-browser' to textlintrc

* Update use of 'cross-browser' hyphenated.

* minor editing / mostly fixing broken links and 'url' links

* remove references to open --browser flag

* add helpful info on cron expressions

* rename cross browser guide

* add localized titles for cross browser guide

* fix typo

* package-lock again

* add cross browser testing to russian titles

* add isBrowser pages to russian titles

Co-authored-by: Amir Rustamzadeh <334337+amirrustam@users.noreply.github.com>

* remove Node from textlint rules

* Begin writing changelog for 4.0

* Fix broken examples for writeFile yields change + add to migration guide

* Write descriptions of features / bugfixes relating to issues in Changelog.

* remove isbrowsertype doc per changes in Firefox branch.

* Improve the isBrowser doc

* Add a summary and features for browser support.

* Make updates based off of feedback for migration guide + changelog

* update migration guide version references

* Update dep versions from latest changes.

* Cypress issue#92: cy.contains() doc. (#2397)

* New option for cy.contains()

* Added migration guide for cy.contains().

* Added more documentation for contains().

* Fixed wording.

* Fix typo.

* Update source/guides/references/migration-guide.md

Co-Authored-By: James Hollowell <jamesthollowell@gmail.com>

* 3.8.4 Release (#2455)

* 3.8.4 Release

* Document process profiler (#2407)

* Document process profiler

* Update source/guides/guides/debugging.md

Co-authored-by: Jennifer Shehane <shehane.jennifer@gmail.com>

* minor updates + add image of example process profiler output

Co-authored-by: Jennifer Shehane <shehane.jennifer@gmail.com>

* Update docs for browser type changes (#2454)

* Add 'Chromium based browser 'family' to migration guide

* Add migration guide for --browser flag changes

* Use one line per shell run

* Add more closed issues to 4.0.0 changelog + fix broken links

* remove --browser canary deprecation - it is still supported

* add example for selecting chromium-based

* add cross linking between parallelization, CI, and cross browser guides

* add note about ff gc issue to cross browser guide

* add firefoxGcInterval config docs

* add doc changes to 4.0.0 changelog

* update wording for isBrowser

* update isBrowser docs

* Update isBrowser to match the signature of other doc pages.

* Add 'see also' links to for newer docs

* Fix syntax error in example

* Update type of isCy arg to be Object

* Remove extraneous doc update mentions in 4.0 changelog

* Add notes about video recording not working in Firefox headless and Electron headed

* Add section around firefoxGcInterval - interlink to section

* Add warning note about Firefox headless video recording

- reduce size of GC warning and instead refer to official doc section.

* before:browser:launch api changes (#2458)

* before:browser:launch api changes

* Add to 4.0 changelog + add history to browser-launch-api

* add docs for changing browser preferences

* update browser extensions docs

* Update source/guides/references/migration-guide.md

Co-Authored-By: Brian Mann <brian.mann86@gmail.com>

* Add headings for sections

* Make sure comments mention 'Chromium-based' instead of static Chrome

* update before:browser:launch, document breaking electron change

Co-authored-by: Jennifer Shehane <shehane.jennifer@gmail.com>
Co-authored-by: Zach Bloomquist <github@chary.us>
Co-authored-by: Brian Mann <brian.mann86@gmail.com>

* Remove warning about Firefox headless browser from cross browser

* Make note that Firefox is run in headed by default

* Add issue for plugin event types to changelog

* Updates to isbrowser

* remove windowSize from browser-launch-api docs

* document --browser canary breaking

* update docs for firefox headless

* Add section to TypeScript doc for plugins (#2466)

* Minor updates

* Make sure that Firefox is mentioned as 'beta' support

* Add Edge Beta, Canary, Dev support to browsers list

* fix broken isbrowser links

* Document actual properties for all browser methods/hooks

* Update photo of browser list dropdown in include all browsers

* update descriptions of browser properties off of feedback

* Style images within notes to have no margin

* Add link to track progress for firefoxGcInterval issue

* Other updates for guides from final review

Co-authored-by: Jennifer Shehane <shehane.jennifer@gmail.com>
Co-authored-by: Gleb Bahmutov <gleb.bahmutov@gmail.com>
Co-authored-by: Amir Rustamzadeh <334337+amirrustam@users.noreply.github.com>
Co-authored-by: Kukhyeon Heo <sainthkh@naver.com>
Co-authored-by: James Hollowell <jamesthollowell@gmail.com>
Co-authored-by: Zach Bloomquist <github@chary.us>
Co-authored-by: Ben Kucera <14625260+Bkucera@users.noreply.github.com>
Co-authored-by: Brian Mann <brian.mann86@gmail.com>