Zotero Figure does not show context menu or UI on Zotero 7 (Linux, v0.2.5–0.2.7)

[bertomat]

Environment

• OS: Linux (Zorin OS 17.3)
• Zotero version: 7.0.27 (stable)
• Plugin version(s) tested: 0.2.5, 0.2.6, 0.2.7 (and self-built from main)
• Java version: openjdk 21.0.4 (tested OK with java -jar pdffigures2.jar)
• pdffigures2.jar: Works correctly when run standalone.

Problem

The plugin installs successfully and initializes (confirmed via the Zotero Error Console), but it does not add any visible UI elements — no “Extract Figures” item in the right-click context menu on PDF attachments, and no Tools → Zotero Figure entry.

The extension appears in Zotero’s Add-ons list and loads without errors.
Console output during startup shows only:
patching getField zoterofigure.js:397
patching setField zoterofigure.js:397
patching isFieldOfBase zoterofigure.js:397

but no registration of menu items.

Running Zotero.ZoteroFigure in the developer console confirms:

• The plugin is alive ("alive": true)
• All modules (UI, Menu, Reader) are initialized
• But commands and Menu.elementCache are empty, indicating that no menus were registered.

Manually invoking
await Zotero.ZoteroFigure.hooks.onMainWindowLoad(window);
completes successfully but does not create any UI elements.

Rebuilding from source (npm install && npm run build with Node 20) and reinstalling the XPI produces the same behavior.

Expected behaviour
After installation and restart, a context menu item (Extract Figures) should appear when right-clicking a PDF attachment, or a toolbar/button/menu entry should allow figure extraction.

Additional notes

• This behavior occurs identically on Ubuntu and Fedora.
• The problem persists across 0.2.5–0.2.7 releases and the latest commit from main.
• Appears to be related to Menu.register() or UI initialization timing — possibly a regression introduced during the Zotero Plugin Toolkit 3.0 migration.
• Running pdffigures2.jar manually works as expected

Request
Please verify menu registration on Zotero 7 Linux builds and re-enable or delay Menu.register() to ensure UI elements are added after main window load.

[bertomat]

🔍 Diagnostic snippet (from my Zotero setup)

Console trace on startup

patching  getField zoterofigure.js:397:22
patching  setField zoterofigure.js:397:22
patching  isFieldOfBase zoterofigure.js:397:22
console.trace() zoterofigure.js:401:20
    log jar:file:///home/bert/.zotero/zotero/46i5j9zz.default/extensions/zoterofigure@polygon.org.xpi!/chrome/content/scripts/zoterofigure.js:401
    setData ... zoterofigure.js:2337
    FieldHookManager ... zoterofigure.js:2599
    ZoteroToolkit ... zoterofigure.js:4007
    createZToolkit ... zoterofigure.js:4735
    Addon ... zoterofigure.js:4766
    startup .../bootstrap.js:39
    _callMethod chrome://zotero/content/xpcom/plugins.js:233
    init chrome://zotero/content/xpcom/plugins.js:74

`Zotero.ZoteroFigure` object dump (abridged)

{
  "alive": true,
  "addonDir": "/home/bert/zotero/zoterofigure",
  "dataDir": "/home/bert/zotero/zoterofigure/data",
  "figureDir": "/home/bert/zotero/zoterofigure/figure",
  "UI": { "elementCache": [] },
  "Menu": { "ui": { "elementCache": [] } },
  "Prompt": { "commands": [] },
  "ToolkitVersion": "3.x"
}

Manual invocation

await Zotero.ZoteroFigure.hooks.onMainWindowLoad(window);
// ===> undefined (completed successfully)

No menu or toolbar item appeared afterwards.

---

✅ Summary of findings

• Plugin loads successfully and initializes internal modules.
• No UI or context-menu entries registered.
• Manual UI-hook invocation completes but has no effect.
• Suggests regression or missing Menu.register() in current Zotero 7 Linux builds.

[cylixlee]

I encountered this problem too. I'm using Zotero 7 on Windows (Zotero 7.0.30, 64 bit), and this plugin seems not working.