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diff --git a/subfiles/change-firefox-dns.md b/subfiles/change-firefox-dns.md
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--- a/subfiles/change-firefox-dns.md
+++ b/subfiles/change-firefox-dns.md
@@ -6,11 +6,22 @@
Mozilla (Firefox) has partnered up with Cloudflare and will resolve the domain names from the application itself via a DNS server from Cloudflare.
Cloudflare will then be able to read everyone’s DNS requests.
-You can disable it in “about:config".
+> You can disable it in “about:config"
- The string value of "`network.trr.uri`" should be empty.
- The string value of "`network.trr.resolvers`" should be set to `[]`.
+> Or in /distribution/policies.json` (Firefox ESR)
+
+```
+...
+ "DNSOverHTTPS": {
+ "Enabled": false,
+ "ProviderURL": "https://0.0.0.0/"
+ },
+...
+```
+
Some other settings can also contain Cloudflare URLs. It is recommended to search for "`cloudflare`".
GNU Icecat and older Firefox versions(<68) are not affected *yet*.