Proxy failures, by browser

Every page below follows the same shape: the exact strings people search, a checklist where each step is a runnable curl command, a table splitting causes into the browser, the proxy and credential handling, and an explicit list of what the page cannot fix.

• AdsPower proxy not working
  AdsPower says the proxy failed or the connection test failed. Work out whether the browser, the proxy, or your credential handling is at fault, using curl commands you can paste into a terminal.
• AdsPower proxy setup
  Set up a proxy in AdsPower without discovering the problem three profiles later. Confirm the protocol, the exit IP, the credential format and the chain with curl first, then configure the browser.
• GoLogin proxy not working
  A proxy check that answers only pass or fail cannot say which layer failed. Work out whether the browser profile, the proxy itself, or your credential handling is at fault, using curl commands you can paste into a terminal.
• Multilogin proxy check failed
  A proxy check and the site you actually use are two different requests over the same connection, and either can fail without the other. Work out whether the check, the proxy, or your credentials are at fault, with copy-paste curl commands for both targets.
• Dolphin Anty proxy error
  Dolphin Anty proxy errors can come from the credential string format as easily as from the proxy itself. Verify the format and the connection separately with curl before touching the profile again.
• Dolphin Anty proxy format
  Dolphin Anty only accepts a proxy written as one string in a few fixed shapes, not free text. Get the field order or the protocol prefix wrong and the profile fails before it ever reaches the network - here is how to rebuild the string field by field with curl before you touch the profile again.
• Octo Browser failed to get proxy data
  Octo Browser's 'failed to get proxy data' message describes reading the proxy configuration, not reaching the proxy over the network. Confirm the proxy works with curl first, then narrow down what Octo is actually failing at.
• Incogniton proxy status: no connection
  When Incogniton shows a proxy status of no connection, the cause is almost always the proxy string, the port, or an expired plan - not Incogniton. Here is how to check each in a couple of minutes.
• MoreLogin proxy detection failed
  MoreLogin marks a proxy as detection failed when it cannot complete a test request through it. Before assuming the proxy is dead, check the protocol, the host and port, and the credential string with curl commands that reproduce the same request outside MoreLogin.