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The timing section of the Firefox Network Monitor documentation, "Blocked" is explained as:
Time spent in a queue waiting for a network connection.
The browser imposes a limit on the number of simultaneous connections that can be made to a single server. In Firefox this defaults to 6
Is the limit on the number connections the only limitation? Or is the browser blocked waiting to get a connection from the OS count as blocked too?
In a fresh browser, on a first connection, before any other connection is made (so the limit should not apply here), I get blocked for 195 ms.
Is this the browser waiting for the OS? Was does "Blocked" mean here?
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Hover over the item you want to block in the Request List. Select Block URL from the context menu.
To protect your information from being stolen, Firefox Developer Edition has not connected to this website. This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox Developer Edition only connect to it securely. As a result, it is not possible to add an exception for this certificate.
Chosen Solution Hi, try: Type '''about:config''' into the address bar, press Enter, accept the warning, scroll down to '''devtools. scratchpad. enabled''' and double click on it to change 'Value' from True to False, then restart Firefox.
We changed the Firefox setting (about:config) 'network.http.max-persistent-connections-per-server' to 64 and the blocks went away. We changed it back to 6. We changed our design/development method to a more 'asynchronous' loading method so as not to have a large number simultaneous connections. The blocks were mostly loading a lot of png flags for locale settings.
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