Firefox desktop · Research guidance. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Identify the prompt and task
Record whether Firefox is showing Secure Site Not Available, an insecure-password warning or a different connection error. These are distinct states. Before continuing with any private account task, establish the intended website address and the publisher’s supported secure route rather than treating every browser warning as a nuisance to remove.
Find the setting for this release
Mozilla’s current HTTPS-Only guidance shows both older direct Privacy & Security controls and newer Connection and software security, Advanced settings placement. Use the interface present in the installed Firefox version. The choices include enabling the mode broadly or for private windows; read the selected scope rather than assuming it applies identically everywhere.
Keep strict and fallback behaviours distinct
Mozilla distinguishes HTTPS-Only, which prompts before an insecure connection, from HTTPS-First upgrades that can fall back when necessary. A normal page loading in one configuration does not prove another configuration is malfunctioning. Record the actual mode before comparing results across browsers or profiles.
Avoid sending secrets through an unclear route
If the intended secure site is unavailable, return to the legitimate publisher for clarification and retain the warning as evidence. Do not enter account details into an insecure alternative merely because a page is accessible there. An exception changes the connection decision; it does not verify the operator, renew a plan or establish rights to a programme.
Questions, answered
Are HTTPS-First and HTTPS-Only identical?
No. Mozilla documents different fallback and prompting behaviour.
Is every Firefox version’s settings layout identical?
No. Follow the current installed interface.