PT ↔ Tor Browser Plugin to obfuscate/spoof traffic to ISP monitor

aka PT, Pluggable-Transport

obfs4

newer PT to randomise TOR

obfs3

Deprecated PT to randomise Tor Browser traffic

snowflake

PT to use tab browser tab as transient Bridge

Source: snowflake.torproject.org/

meek

PT to mask traffic similar to certain websites

fte

PT to disguise traffic as "ordinary" HTTP

References

1. obfs3 ↔ Deprecated PT to randomise Tor Browser traffic

2. obfs4 ↔ newer PT to randomise TOR

3. Bridge ↔ secret PT Relay to connect Tor Circuit. UID as Bridge-emoji sequence || QR

4. meek-azure ↔ PT to mask traffic similar to MS azure-site

5. snowflake ↔ PT to use tab browser tab as transient Bridge

6. fte ↔ PT to disguise traffic as "ordinary" HTTP

7. meek ↔ PT to mask traffic similar to certain websites