diff --git a/.eslintignore b/.eslintignore
index e57be2186..8f9434ed3 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -48,3 +48,4 @@ package-lock.json
/suites/react-stockcharts
/suites-experimental/responsive-design/build-dev/
+/suites-experimental/stormbox-react/
diff --git a/.prettierignore b/.prettierignore
index 0b1b6168e..40d154c13 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -48,3 +48,4 @@ package-lock.json
/suites/react-stockcharts
/suites-experimental/responsive-design/build-dev/
/suites-experimental/responsive-design/**/*.generated.css
+/suites-experimental/stormbox-react/
diff --git a/resources/benchmark-runner.mjs b/resources/benchmark-runner.mjs
index a582087d3..76adecb6f 100644
--- a/resources/benchmark-runner.mjs
+++ b/resources/benchmark-runner.mjs
@@ -324,6 +324,7 @@ export const WarmupSuite = {
item.enter("keypress");
item.dispatchEvent("input");
item.enter("keyup");
+ item.scrollTop = item.scrollHeight - item.clientHeight;
}),
new BenchmarkTestStep("WarmingUpPageElementMouseMethods", (page) => {
const item = page.getElementById("testItem");
diff --git a/suites-experimental/stormbox-react/.gitignore b/suites-experimental/stormbox-react/.gitignore
new file mode 100644
index 000000000..07e6e472c
--- /dev/null
+++ b/suites-experimental/stormbox-react/.gitignore
@@ -0,0 +1 @@
+/node_modules
diff --git a/suites-experimental/stormbox-react/LICENSE b/suites-experimental/stormbox-react/LICENSE
new file mode 100644
index 000000000..d0a1fa148
--- /dev/null
+++ b/suites-experimental/stormbox-react/LICENSE
@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+ means each individual or legal entity that creates, contributes to
+ the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+ means the combination of the Contributions of others (if any) used
+ by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+ means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+ means Source Code Form to which the initial Contributor has attached
+ the notice in Exhibit A, the Executable Form of such Source Code
+ Form, and Modifications of such Source Code Form, in each case
+ including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+ means
+
+ (a) that the initial Contributor has attached the notice described
+ in Exhibit B to the Covered Software; or
+
+ (b) that the Covered Software was made available under the terms of
+ version 1.1 or earlier of the License, but not also under the
+ terms of a Secondary License.
+
+1.6. "Executable Form"
+ means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+ means a work that combines Covered Software with other material, in
+ a separate file or files, that is not Covered Software.
+
+1.8. "License"
+ means this document.
+
+1.9. "Licensable"
+ means having the right to grant, to the maximum extent possible,
+ whether at the time of the initial grant or subsequently, any and
+ all of the rights conveyed by this License.
+
+1.10. "Modifications"
+ means any of the following:
+
+ (a) any file in Source Code Form that results from an addition to,
+ deletion from, or modification of the contents of Covered
+ Software; or
+
+ (b) any new file in Source Code Form that contains any Covered
+ Software.
+
+1.11. "Patent Claims" of a Contributor
+ means any patent claim(s), including without limitation, method,
+ process, and apparatus claims, in any patent Licensable by such
+ Contributor that would be infringed, but for the grant of the
+ License, by the making, using, selling, offering for sale, having
+ made, import, or transfer of either its Contributions or its
+ Contributor Version.
+
+1.12. "Secondary License"
+ means either the GNU General Public License, Version 2.0, the GNU
+ Lesser General Public License, Version 2.1, the GNU Affero General
+ Public License, Version 3.0, or any later versions of those
+ licenses.
+
+1.13. "Source Code Form"
+ means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+ means an individual or a legal entity exercising rights under this
+ License. For legal entities, "You" includes any entity that
+ controls, is controlled by, or is under common control with You. For
+ purposes of this definition, "control" means (a) the power, direct
+ or indirect, to cause the direction or management of such entity,
+ whether by contract or otherwise, or (b) ownership of more than
+ fifty percent (50%) of the outstanding shares or beneficial
+ ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+ Licensable by such Contributor to use, reproduce, make available,
+ modify, display, perform, distribute, and otherwise exploit its
+ Contributions, either on an unmodified basis, with Modifications, or
+ as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+ for sale, have made, import, and otherwise transfer either its
+ Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+ or
+
+(b) for infringements caused by: (i) Your and any other third party's
+ modifications of Covered Software, or (ii) the combination of its
+ Contributions with other software (except as part of its Contributor
+ Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+ its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+ Form, as described in Section 3.1, and You must inform recipients of
+ the Executable Form how they can obtain a copy of such Source Code
+ Form by reasonable means in a timely manner, at a charge no more
+ than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+ License, or sublicense it under different terms, provided that the
+ license for the Executable Form does not attempt to limit or alter
+ the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+* *
+* 6. Disclaimer of Warranty *
+* ------------------------- *
+* *
+* Covered Software is provided under this License on an "as is" *
+* basis, without warranty of any kind, either expressed, implied, or *
+* statutory, including, without limitation, warranties that the *
+* Covered Software is free of defects, merchantable, fit for a *
+* particular purpose or non-infringing. The entire risk as to the *
+* quality and performance of the Covered Software is with You. *
+* Should any Covered Software prove defective in any respect, You *
+* (not any Contributor) assume the cost of any necessary servicing, *
+* repair, or correction. This disclaimer of warranty constitutes an *
+* essential part of this License. No use of any Covered Software is *
+* authorized under this License except under this disclaimer. *
+* *
+************************************************************************
+
+************************************************************************
+* *
+* 7. Limitation of Liability *
+* -------------------------- *
+* *
+* Under no circumstances and under no legal theory, whether tort *
+* (including negligence), contract, or otherwise, shall any *
+* Contributor, or anyone who distributes Covered Software as *
+* permitted above, be liable to You for any direct, indirect, *
+* special, incidental, or consequential damages of any character *
+* including, without limitation, damages for lost profits, loss of *
+* goodwill, work stoppage, computer failure or malfunction, or any *
+* and all other commercial damages or losses, even if such party *
+* shall have been informed of the possibility of such damages. This *
+* limitation of liability shall not apply to liability for death or *
+* personal injury resulting from such party's negligence to the *
+* extent applicable law prohibits such limitation. Some *
+* jurisdictions do not allow the exclusion or limitation of *
+* incidental or consequential damages, so this exclusion and *
+* limitation may not apply to You. *
+* *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+ This Source Code Form is subject to the terms of the Mozilla Public
+ License, v. 2.0. If a copy of the MPL was not distributed with this
+ file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+ This Source Code Form is "Incompatible With Secondary Licenses", as
+ defined by the Mozilla Public License, v. 2.0.
diff --git a/suites-experimental/stormbox-react/README.md b/suites-experimental/stormbox-react/README.md
new file mode 100644
index 000000000..e322c8c15
--- /dev/null
+++ b/suites-experimental/stormbox-react/README.md
@@ -0,0 +1,125 @@
+# Stormbox-React
+
+A React clone of the Stormbox webmail front end (Vue 3, Thunderbird) and no
+server: the mailbox is generated in the page from a fixed seed, so every
+run renders the same folders, messages and dates.
+
+ npm install
+ npm run dev # development React
+ npm run build # production build into dist/, plus dist/resources.txt
+ npm run preview # serve dist/ (use this for timing outside Speedometer)
+ npm run typecheck
+
+The committed `dist/` is what the suite runs; rebuild and commit it after
+changing `src/`. Run it with `/?developerMode&suites=Stormbox-React`.
+
+The suite loads `dist/index.html?animations=off`, which removes CSS
+transitions and the reading pane's 310ms wait for the folder list, so the
+800px viewport's responsive layout (opening a message hides the folder list)
+happens within the interaction that triggers it.
+
+Steps, each interaction followed by a task yield:
+
+- `SwitchFolders`: large folders, nested subfolders and the Starred tag view.
+- `ScrollMessageList`: the virtualized Inbox, a viewport at a time, then in
+ strides.
+- `ReadMessages`: opens a message, then the next 15 with J. HTML bodies go
+ through DOMPurify, dark-mode adaptation and a sandboxed srcdoc iframe.
+- `StarAndTagMessages`: the row overlay's star, and its tag popover.
+- `BulkActions`: select all 1,200 Inbox messages, mark read, star, tag.
+- `QuickFilter`: types and erases a filter over the Inbox.
+- `ArchiveAndDelete`: checkbox selections archived and deleted, then Trash
+ emptied.
+- `ComposeAndSend`: replies (Squire with the quoted message) and new
+ messages with a recipient pill, all sent.
+- `ToggleTheme`: light and dark with an HTML newsletter open.
+
+## Scope
+
+The Mail space is cloned:
+
+- Top bar (quick filter, theme toggle, app drawer, account menu), spaces
+ rail and the folder list with nested and starred folders, the Tags
+ section and storage bar.
+- The virtualized message list (`@tanstack/react-virtual`, 64px rows,
+ 96px card rows under 480px) with Stormbox's header tiers, Unread and
+ Starred filters, the Quick Filter, anchored multi-select (checkbox,
+ Shift/Cmd-click, Shift+Arrow, Cmd+A), bulk actions with overflow, the
+ row hover overlay (tag, star, archive, delete), the tag menu as dropdown
+ and popover, drag and drop onto folders and tags, and keyboard
+ navigation.
+- The reading pane: HTML bodies through DOMPurify, Stormbox's dark-mode
+ adaptation and a sandboxed `srcdoc` iframe with fit-to-width zoom;
+ plain-text bodies linkified with nested quote bars; attachments bar,
+ tag chips, scheduled-send banner, maximize.
+- The composer: From picker, recipient pills with autocomplete over a
+ 400-contact address book, Cc/Bcc, the Squire rich text editor with its
+ toolbar overflow, Send and Send Later, minimize-to-dock, the close
+ prompt, reply / reply all / forward, and opening drafts.
+- Stormbox's responsive layout: below 1024px an open message hides the
+ folder list, below 640px a single column.
+- The web shortcut scheme (C, R, Shift+R, F, A, M, S, T, 0–9, Delete,
+ J/K/N/P, `/`, Ctrl/Cmd+K, Escape).
+
+Not cloned: Contacts (the rail button shows a placeholder), settings, the
+folder and tag managers, onboarding, multiple message columns, sender
+favicons (they come from a server-side proxy) and file attachments.
+
+## What is shared with Stormbox
+
+- `src/utils/` holds Stormbox's framework-independent modules copied
+ verbatim: HTML sanitizing and srcdoc building, dark-mode email
+ adaptation, address parsing, tag model, folder presentation, sender
+ avatars. Beyond import paths, `message-row-presentation.ts` and
+ `compose-quote.ts` changed to format dates against the fixed clock in
+ `src/clock.ts`, and `folder-presentation.ts` maps roles to SVG
+ components instead of SVG strings. Stormbox's `plaintext-html.ts` is
+ replaced by `plaintext-body.tsx` (see below).
+- `src/styles/styles.css` and `app.css` are Stormbox's global and shell
+ stylesheets. `components.css` is generated from the components' Vue
+ `
+
+You are receiving this email because you subscribed to ${xn(n.name)}.
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