Changing theme on a Reddit snapshot makes Zotero unresponsive

mjthoraval · 2025-02-23T14:11:29+00:00

I have imported the webpage from a Reddit post (Save to Zotero - Web Page with Snapshot):
https://www.reddit.com/r/zotero/comments/16qkyw1/plugins_problem/

After selecting the snapshot, it shows the following error in the Debug Output:

[JavaScript Error: "Failed to attach Declarative Shadow DOM."]

Then, I open the snapshot. If I try to change the theme, I get the following error:
https://s3.amazonaws.com/zotero.org/images/forums/u265723/w33dckwr0dc1zjuw5cek.png

A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.

Script: resource://zotero/reader/reader.js line 43084 > eval:795

Debug ID D658002257
Zotero 7.1-beta.14+2e9b9d407 (64-bit)
Windows 10

AbeJellinek · 2025-02-24T17:30:09+00:00

I can't reproduce. Does this still happen if you restart Zotero? If so, could you email the snapshot file to support@zotero.org and include a link to this thread?

mjthoraval · 2025-02-24T17:39:10+00:00

It still happens after restarting Zotero.
File sent.

AbeJellinek · 2025-02-25T20:55:04+00:00

That page has an extraordinarily large amount of style code, and the theme engine needs to parse and rewrite all of it. We'll look into preventing that dialog, but there's little we can do about the freeze itself (the Dark Reader browser extension, which snapshot theming is based on, has the same issue).