Solved XFCE (v.4.19 > v.4.20) & tor-browser (v.14 > v.15) changed icon to firefox.

[USerID]

After regularly updating the Tor browser from version 14 to version 15, the browser changed its logo (see screenshot).
Moreover, if you compare pixel by pixel (in GIMP), the Tor browser logo is smaller than the Firefox logo.
Everything has been updated to the latest versions.
XFCE, FreeBSD updated regularly starting from versions 4.19 and 14.2 respectively.
Now this pain in the ass has appeared: I can't tell the browsers apart when they are both open
and on the panel.

 

[T-Daemon]

It looks like the desktop tor-browser icons (default*.png) have been updated (rebrand [1] ) on August 12, after the port was updated to 15.0.a1 on 08 Aug 2025.

Currently, at the time of this writing, these updates are not included in the src-firefox-...15.0-1-build3 (released 2025-07-30) from which the port is build from. A future tb-release src-firefox should include the icons.

Meanwhile, you could remove old icons, download [1] and add new icons under /usr/local/lib/tor-browser/browser/chrome/icons/default

[1] https://gitlab.torproject.org/tpo/a...-1/browser/branding/tb-release?ref_type=heads

See also
branding, tb-alpha/nightly/release: https://gitlab.torproject.org/tpo/a...2.0esr-15.0-1/browser/branding?ref_type=heads
Commits, TB 2176: Rebrand Firefox to TorBrowser:
. https://gitlab.torproject.org/tpo/a...mits/53fdcf1d84bf5273032f1ebca4569cb3fa166f43

 

[USerID]

T-Daemon, thanks!
These files were enough to restore the appearance.
cd /usr/local/lib/tor-browser/browser/chrome/icons/default/
ls -la

drwxr-xr-x  2 root wheel   512 Aug 22 10:47 .
drwxr-xr-x  3 root wheel   512 Aug 13 16:33 ..
-rw-r--r--  1 none wheel  2408 Aug 15 17:41 386502_browser_onion_tor_icon(1).png
-rw-r--r--  1 root wheel 10472 Jul 24 23:16 about-logo.svg
-rw-r--r--  1 root wheel 14949 Aug 22 09:32 default128.png
-rw-r--r--  1 root wheel   817 Aug 22 10:44 default16.png
-rw-r--r--  1 root wheel  1253 Aug 22 10:43 default22.png
-rw-r--r--  1 root wheel  2044 Aug 22 10:44 default32.png
-rw-r--r--  1 root wheel  3577 Aug 22 10:45 default48.png
-rw-r--r--  1 root wheel  5238 Aug 22 10:45 default64.png