357773505 error notes

Original error message:
Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIFile.remove]
From the trace:
[JavaScript Error: "sidetoolbar is null" {file: "chrome://cohere/content/cohereOverlay.js" line: 297}] <<unrelated to Zotero--why should this show up here?>>

<<long list of the following>>
sync.zotero.org : potentially vulnerable to CVE-2009-3555

api.zotero.org : potentially vulnerable to CVE-2009-3555

If these errors are unrelated to Zotero, how does one come to understand that and ignore them?
  • does anything actually go wrong? If so, please describe what's actually happening.
    Otherwise just ignore.
    The chrome error, e.g., shows up because the report error feature logs all chrome related errors.

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