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Raise the v6 browser support floor - #43177

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mdo merged 2 commits into
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docs/browser-support-floor
Nov 4, 2026
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mdo merged 2 commits into
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docs/browser-support-floor

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@mdo

@mdo mdo commented Oct 23, 2026

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  • Raise the Chrome and Edge floor to 138, Firefox to 147, and Safari to 26
  • Remove the stale unreleased versions query
  • Document newly available platform features and remaining browser gaps
  • Update the migration guide with the new minimum versions

Closes #43064

@mdo mdo added this to the v6.0.0-alpha.2 milestone Oct 23, 2026
@mdo mdo added this to v6.0.0 Oct 23, 2026
@github-project-automation github-project-automation Bot moved this to Inbox in v6.0.0 Oct 23, 2026
@julien-deramond julien-deramond added v6 v6, the main branch docs Documentation site and its content labels Oct 23, 2026
@coliff

coliff commented Oct 24, 2026 •

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Preview: https://deploy-preview-43177--twbs-bootstrap.netlify.app/docs/6.0/getting-started/browsers-devices/

Looking good! I was a bit concerned about dropping support for iOS 18 so soon, but I suppose the only devices on that (that can't update to iOS 26) are iPhone XS, XS Max and XR which came out in 2018. Also, even though iOS 18 isn't officially supported I guess it'll mostly work the same anyway.

Two feedback item about the docs...

  1. this table switches to stacked but it's only ever 2 columns and would display fine as a regular table even on a small iPhone screen.
screenshot
  1. It says ::details-content for styling the expandable part of <details> is new since alpha1 but we did have this in alpha 1 - in fact I think I added this in a PR :-) (can see by doing CTRL+F on https://cdn.jsdelivr.net/npm/bootstrap@6.0.0-alpha.1/dist/css/bootstrap.css). It doesn't have full browser support yet though...

mdo added 2 commits November 3, 2026 21:21
Set the browser targets for the rest of the v6 release line and document
which platform features they make safe to use. Remove the stale unreleased
versions query and clarify which newer features remain unavailable.
Keep the minimum-version table in two columns on small screens.
Clarify that the higher browser floors expand support for features
already used as progressive enhancements in alpha 1.
@mdo
mdo force-pushed the docs/browser-support-floor branch from e60fcf4 to 363fe5d Compare November 4, 2026 05:21
@mdo
mdo merged commit 0117328 into main Nov 4, 2026
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@mdo
mdo deleted the docs/browser-support-floor branch November 4, 2026 05:32
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