Firefox browser live HTTP headers not available

The hands of the cheap Firefox upgrade, a lot of plug-ins can not be used. I'm using live HTTP headers here as an example. The main performance is that after the live HTTP headers modifies the packet, especially after the post packet, the replay data is not displayed, stating that the post packet is ignored during browser processing. The specific view of the next online, should be 43 version and later versions are the same.

PS, the repair process can refer to http://www.freebuf.com/sectool/58071.html, translation is very good, the original connection http://www.mrt-prodz.com/blog/view/2014/09/ Fixing-live-http-headers-017-add-on

Principle:

If-modified-since is a standard HTTP request header tag that, when sending an HTTP request, sends the last modification time of the browser-side cache page to the server, which compares the time to the last modification time of the actual file on the server.

If-modified-since is used to record the last modification time of the page HTTP header information, is sent to the server by the client header, similar to the last-modified, the difference is that the last-modified is sent by the server to the client HTTP headers.
If the time is consistent, then return the HTTP status Code 304 (do not return the contents of the file), after the client receives, the local cache file is displayed directly to the browser.
If the time is inconsistent, the HTTP status code 200 and the new file contents are returned, and when the client receives it, it discards the old file, caches the new file, and displays it in the browser.

If you add if-modified-since: * to the default HTTP header of the replay feature in live HTTP headers, the replay will work correctly.

Steps:

1. Find plugin file: About:support

2. Enter c:\users\*****\appdata\roaming\mozilla\firefox\profiles\avreht9c.default\extensions\{ 8f8fe09b-0bd3-4470-bc1b-8cad42b8203a}\chrome directory, modify Livehttpheaders.jar. Unzip with the Unzip tool (the jar file is decompressed and compressed with the extract file is modified) to modify the livehttpreplay.js in the content.

3, using the extracted files to package the modified folder into Livehttpheaders.jar, restart the browser.

Firefox browser live HTTP headers not available