Re: PSA: HTML fragment mode interaction between Chromium, Clipboard & Notepad++

To keep tests together, here is a post from Lawrence that shows his tests
on Linux, similar to those Carlos tried to run, match this PSA exactly!


From: Lawrence D'Oliveiro <[email protected]>
Newsgroups: alt.comp.software.firefox,comp.sys.mac.system,alt.os.linux
Subject: Re: PSA: Clipboard differences between Chromium & Firefox across platforms
Date: Fri, 13 Feb 2026 23:17:22 -0000 (UTC)
Message-ID: <[email protected]>

On Thu, 12 Feb 2026 15:26:32 -0500, Maria Sophia wrote:

> The HTML Fragment issue showed up for me on Windows when pasting
> into Notepad++ from Chromium, but the underlying cause applies to
> all platforms because it apparently comes from how Chromium
> generates clipboard data,, which is DIFFERENT from how Firefox does
> the same copy/paste tasks.
>
> Even as Firefox uses a different and more conservative clipboard
> path, the problem seemed almost random because the editor is
> intimately involved.

Do you have a tool for inspecting the clipboard contents? In
particular, listing the different formats in which the clipboard
contents are being offered? That might shed more light on what exactly
is going on.

Here are some examples from my Linux system.

* Copying some text from Emacs:

    ldo@theon:~> wl-paste -l
    GTK_TEXT_BUFFER_CONTENTS
    application/x-gtk-text-buffer-rich-text
    text/plain;charset=utf-8
    UTF8_STRING
    COMPOUND_TEXT
    TEXT
    text/plain
    STRING
    text/plain;charset=utf-8
    text/plain
    SAVE_TARGETS

* Copying some text from a web page in Firefox:

    ldo@theon:~> wl-paste -l
    text/html
    text/_moz_htmlcontext
    text/_moz_htmlinfo
    text/plain;charset=utf-8
    UTF8_STRING
    COMPOUND_TEXT
    TEXT
    text/plain
    STRING
    text/plain;charset=utf-8
    text/plain
    text/x-moz-url-priv
    SAVE_TARGETS

* Copying the same text from the same web page in Chromium:

    ldo@theon:~> wl-paste -l
    chromium/x-source-url
    text/html
    STRING
    TEXT
    UTF8_STRING
    text/plain
    text/plain;charset=utf-8
    chromium/x-internal-source-rfh-token
    text/plain;charset=utf-8

* Copying the above text from KDE Konsole:

    ldo@theon:~> wl-paste -l
    text/plain
    text/html
    text/plain;charset=utf-8
--