mgbrowser v0.9.25 Experimental Preview

mgbrowser v0.9.25 Experimental Preview

App-wide pure-Rust X11 clipboard (CLIPBOARD and PRIMARY), mouse drag/double-click
text selection, and Cut / Copy / Paste / Select All across the DevTools Console,
all six DevTools panels and search/style inputs, the Address bar, HTML <input>
form controls (with <input type="password"> plaintext protection), and read-only
web page content. Exact-source publication and public-install receipts are
recorded in the dated work log.

Linux x86_64 / X11 or XWayland, glibc 2.35 or newer. Rust 1.91.1, locked
dependencies and pure-Rust implementation backends (zero new crate dependencies).

Native X11 Clipboard & App-Wide Text Selection

mg-browser, mg-chassis, and mg-sparkle implement pure-Rust ICCCM X11
selection ownership and retrieval (x11rb) paired with interactive text
selection, editing, and context-menu clipboard actions across every browser
surface:

• Pure-Rust X11 CLIPBOARD & PRIMARY Host (src/platform/clipboard.rs):
  uses a dedicated unmapped 1x1 child window of the root screen (EventMask::PROPERTY_CHANGE)
  so selection ownership survives closing detached browser windows without any C
  toolkit or external helper utility (xclip/xsel). Serves TARGETS,
  TIMESTAMP, UTF8_STRING, text/plain;charset=utf-8, text/plain, TEXT,
  and STRING (SelectionRequest / SelectionClear), and retrieves inbound
  CLIPBOARD (Ctrl+V / Shift+Insert / context-menu Paste) and PRIMARY
  (middle-click Button 2) selections with UTF8_STRING -> STRING fallback,
  bounded INCR transfers (256 KiB), and 0 ms local short-circuit when
  mgbrowser owns the active selection.
• DevTools Console & Panels (crates/mg-chassis/src/devtools.rs):
  • Console Logs & Uncaught JS Errors: click or click-and-drag across Console
    rows (Ctrl+A selects all visible rows), then press Ctrl+C, click the
    subtoolbar Copy button, or right-click (Copy message, Copy all visible,
    Select all, Clear console) to copy full untruncated error messages, stack
    frames, and expanded object property trees. Console Command Line API
    copy(...) also syncs directly to the X11 system CLIPBOARD.
  • Console > REPL & DevTools Filter/Style Inputs: click/drag/double-click
    selection, Shift + arrow/word (Ctrl+Left/Right) range extension,
    Ctrl+A, Ctrl+X / Shift+Delete (Cut), Ctrl+C / Ctrl+Insert (Copy),
    Ctrl+V / Shift+Insert (Paste), middle-click PRIMARY paste, and
    right-click Cut / Copy / Paste / Select all.
  • Elements, Sources, Network, Performance, Application & About: Ctrl+C
    and right-click context menus copy outerHTML, unique CSS selectors, or
    computed style summaries in Elements; selected code lines or full source in
    Sources; request URL, full request/response details, or all captured URLs
    in Network; structured telemetry reports in Performance and Application;
    and build/revision identity on the About dialog.
• Address Bar (Focus::Address): click-to-select-all on initial focus from a
  page, second-click caret placement, click-and-drag substring selection (updating
  PRIMARY) with 2 px caret and highlight rendering, double-click select-all,
  word navigation, Ctrl+A / Ctrl+X / Ctrl+C / Ctrl+V, middle-click
  PRIMARY paste, and right-click Cut / Copy / Paste / Paste and go /
  Select all.
• HTML <input> Form Controls & Password Protection (Focus::Input):
  positioned caret + partial selection highlight rendering in mg-sparkle,
  click/drag/double-click word selection, Ctrl+A / Ctrl+X / Ctrl+C /
  Ctrl+V (updating edit_versions for isolated script-worker form snapshots),
  middle-click PRIMARY paste, and strict <input type="password"> protection
  that blocks Cut, Copy, and PRIMARY drag export of masked password
  characters while permitting Paste.
• Web Page Prose Selection (Focus::Page): Frame::text_runs records
  positioned glyph runs (MAX_TEXT_RUNS = 25,000) for click-and-drag text
  selection with translucent highlight rendering, double-click word selection,
  Ctrl+A select-all, Ctrl+C copy in reading order, PRIMARY export on drag
  or double-click, and right-click Copy (when a selection is active) plus
  Copy link address on links. Cut and Paste remain disabled on read-only page
  prose.

Validation status

Workspace debug and release unit/integration tests (including new app-wide
clipboard/selection unit tests and live two-client X11 CLIPBOARD/PRIMARY
roundtrip tests under Xvfb), component boundary and no-chrome embedding checks,
packaged native X11 smoke gates, all 8 frozen JSPLAN gates, and both complete
reviewed WPT lanes pass.

Install and known limitations

curl -fsSL https://mgbrowser.org/install.sh | bash

The installer follows the latest published release and verifies SHA-256 before
installing without sudo. Checksums are not independent signatures. Existing
processes must restart to use an installed update.

Modern-web compatibility is poor. The Google search to first result journey is
not working. Real Reddit loading and full interactive Google News features
remain unfinished goals. Ordinary Playwright is unsupported: autoattachment,
debugger waiting/resume, downloads, utility worlds, promise awaiting and stock
locator message-size policy remain open. Clipboard transfers support plain UTF-8
and Latin-1 text up to 256 KiB on X11/XWayland; rich HTML/image clipboard MIME
types, JavaScript navigator.clipboard / ClipboardEvent DOM APIs, <textarea>
or contenteditable editing, breakpoint stepping, heap snapshots, and persistent
Web Storage remain outside this bounded increment. This release does not complete
F-011/F-016/F-024/F-025/F-026/F-027 or formal MVP.