Firefox desktop · Research guidance. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Define one reproducible symptom
Choose a specific action that fails, such as a player control that does not respond on a trusted page. Write down the expected and actual result. Save unfinished work before restarting the browser. A controlled comparison is more informative than changing several settings while trying different programmes and describing all of those changes as one test.
Start the temporary mode
Mozilla documents Troubleshoot Mode through Firefox’s Help menu and restart flow. When the diagnostic prompt appears, choose Open to start the temporary mode. Read the button labels carefully. Refresh Firefox is a separate reset action and is not required merely to enter Troubleshoot Mode.
Understand what changed
Troubleshoot Mode temporarily disables extensions and themes and changes other browser components, including hardware acceleration. That makes it a useful broad comparison. It also means that a successful result does not automatically identify one extension as the cause. Several differences exist between the diagnostic session and the usual one.
Repeat the same action
Open the same legitimate page and repeat the original small test. Keep the programme, account state and action as consistent as possible. Note whether the symptom disappears, changes or remains. Do not interpret a different unavailable programme or a new sign-in prompt as the same comparison without recording that difference.
Return and narrow the question
Restart Firefox normally to leave the temporary mode. If the symptom was absent there, follow Mozilla’s extension or theme isolation guidance one change at a time, preserving a way to restore the original state. If it persisted, record that too. The outcome narrows browser investigation; it does not test the service’s billing, rights or every video.
Questions, answered
Should Refresh be selected to enter this mode?
No. Mozilla distinguishes the temporary Open action from the separate Refresh reset.
Does a working test identify a particular extension?
No. Troubleshoot Mode changes several browser components.