uBlock Origin blocks direct SVG downloads when "Block remote fonts" is enabled on Microsoft Edge for Android

[je24yhfy68]

Prerequisites

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• This is NOT a YouTube, Facebook or Twitch report. These sites MUST be reported by clicking their respective links.
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• The issue is not present after disabling uBO in the browser.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.

I tried to reproduce the issue when...

• uBO is the only extension.
• using a new, unmodified browser profile.

Description

Environment

Browser: Microsoft Edge for Android PC:vivaldi

Extension: uBlock Origin

Version:1.70.0

Android version:15

Description of the issue
When using uBlock Origin on Microsoft Edge for Android, enabling the "Block remote fonts" option causes direct SVG downloads to fail.
SVG images themselves load normally, but attempting to download them by long‑pressing the image results in a failed download.
If the website provides a dedicated download button, the SVG file downloads successfully.

Additional notes

This issue also occurs in desktop browsers when I right-click to download an image directly.

Disabling "Block remote fonts" immediately resolves the problem.

A specific URL where the issue occurs.

https://www.svgrepo.com/collection/chunk-16px-thick-interface-icons/
https://www.svgrepo.com/svg/535115/alien

Steps to Reproduce

Steps to reproduce

Install uBlock Origin on Microsoft Edge for Android.

Open uBlock Origin settings.

Enable "Block remote fonts".

Visit a website that displays SVG images.

Long‑press the SVG image and choose “Download image”.

Observe that the download fails.

(If the same page has a download button for the SVG, clicking it downloads the file normally.)

Expected behavior

SVG images should be downloadable via long‑press, just like other image formats, even when "Block remote fonts" is enabled.

Actual behavior

SVG images load correctly.

Long‑press → “Download image” fails.

Clicking a dedicated download button works.

Configuration

Details

uBlock Origin: 1.70.0
Chromium Mobile: 146
filterset (summary):
 network: 652
 cosmetic: 588
 scriptlet: 6
 html: 0
listset (total-discarded, last-updated):
 removed:
  ublock-filters: null
  ublock-badware: null
  ublock-privacy: null
  ublock-unbreak: null
  ublock-quick-fixes: null
  adguard-mobile: null
  easylist: null
  easyprivacy: null
  urlhaus-1: null
  plowe-0: null
  JPN-1: null
 added:
  https://raw.githubusercontent.com/eEIi0A5L/adblock_filter/master/tamago_filter.txt: 1248-2, 2h.34m
 default:
  user-filters: 0-0, never
filterset (user): [empty]
trustedset:
 added: [array of 1 redacted]
userSettings: [none]
hiddenSettings: [none]
supportStats:
 allReadyAfter: 1883 ms (selfie)
 maxAssetCacheWait: 85 ms
 cacheBackend: indexedDB

[gorhill]

What does the logger say?

[gorhill]

Turns out it's legacy from creating uBO as a spin-off of "HTTP Switchboard" in June 2014:

https://github.com/gorhill/uBlock/blob/b5fdac9053/js/ublock.js#L125

SVG resources can be both images or fonts, but since the issue does not exist in Firefox, I will remove equating svg types with font in Chromium.