From Firefox 31 onwards you can use the [&quot;**Enable persistent logs**&quot; setting](https://developer.mozilla.org/en-US/docs/Tools/Settings) to prevent the Network Monitor from clearing the list on reload.

Despite knowing the name for the setting is &quot;Enable persistent logs&quot;, it took me a while to find it on the settings page.  I hope this helps:

[![Location of &quot;Enable persistent logs&quot; setting in Firefox][1]][1]


  [1]: https://i.stack.imgur.com/ihpzU.png

I couldn&#39;t find this setting in Firefox 57. The setting has been moved to the network tab itself, above the log table

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/veTg9.png

Roughly three years after [BeetleJuice](https://stackoverflow.com/users/3977061/beetlejuice)&#39;s [update](https://stackoverflow.com/a/48524848/1529709), it seems to have moved again - now, you need to click the gear icon on the far right side for the option  to appear. Hooray for our ever-changing user interface soup.

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/8iAE8.png

If &quot;Enable persistent Log&quot; settings is not available in the devtool settings, you can go to `about:config`(type this in the URL box and enter) page and search for `persistlog` and change it from there(toggle button on the right).

I can see two options and enabled both. :)

`devtools.netmonitor.persistlog`, `devtools.webconsole.persistlog`

I am referring the following tutorial to make a login page for my web application.
http://code.tutsplus.com/tutorials/intro-to-flask-signing-in-and-out--net-29982

I am having issue with the database.
I am getting an 
    
    ImportError: No module named MySQLdb
when I execute  
    
    http://127.0.0.1:5000/testdb

I have tried all possible ways to install python mysql, the one mentioned in the tutorial, easy_install, sudo apt-get install.

I have installed mysql in my virtual env. My directory structure is just the same as whats explained in the tutorial. The module is sucessfully installed in my system and still I am getting this error.

Please help. What could be causing this.




ImportError: No module named MySQLdb

I have a list of pairs `(a, b)` that I would like to plot with `matplotlib` in python as actual x-y coordinates. Currently, it is making two plots, where the index of the list gives the x-coordinate, and the first plot&#39;s y values are the `a`s in the pairs and the second plot&#39;s y values are the `b`s in the pairs.

To clarify, my data looks like this: `li = [(a,b), (c,d), ... , (t, u)]`
I want to do a one-liner that just calls `plt.plot()` incorrect.
If I didn&#39;t require a one-liner I could trivially do: 

    xs = [x[0] for x in li]
    ys = [x[1] for x in li]
    plt.plot(xs, ys)
 
How can I get matplotlib to plot these pairs as x-y coordinates?

Plotting a list of (x, y) coordinates in python matplotlib

I would like to observe the contents of a POST request whose successful completion results in a `location.reload()` - when I try to capture this request in the Network Panel of the Firefox developer tools, I find that the page reload clears the list of captured events. Can I prevent this clearing?

Can I prevent the Firefox developer tools network panel from clearing on page reload?

<p>I would like to observe the contents of a POST request whose successful completion results in a <code>location.reload()</code> - when I try to capture this request in the Network Panel of the Firefox developer tools, I find that the page reload clears the list of captured events. Can I prevent this clearing?</p>


I&#39;m studying an application developed by our company. It uses the Apache HttpClient library. In the source code it uses the `HttpClient` class to create instances to connect to a server. 

I want to learn about Apache HttpClient and I&#39;ve gone trough [this set of examples][1]. All the examples use `CloseableHttpClient` instead of `HttpClient`. So I think `CloseableHttpClient` is an extended version of `HttpClient`. If this is the case I have two questions:

- What is the difference between these two?
- Which class is recommended to use for my new development?

  [1]: http://hc.apache.org/httpcomponents-client-ga/examples.html


What is the difference between CloseableHttpClient and HttpClient in Apache HttpClient API?

I am using a `PUT` request in my Rails application. Now, a new HTTP verb, `PATCH` has been implemented by browsers. So, I want to know what the main difference between `PATCH` and `PUT` requests are, and when we should use one or the other. 

What is the main difference between PATCH and PUT request?

Upon reading stuffs about POST and get methods [here](https://stackoverflow.com/questions/3063530/whats-the-difference-between-get-and-post-encryption) there is a statement like &quot; when used post method it uses HTTP request Body . What Does it mean &quot; HTTP request body&quot;.? 

What does it mean http request body?

I would like to create a very simple C application that does an HTTP post.  It will take a few parameters, and use these to construct a URL.  I&#39;d just like to do a simple HTTP POST and get the response without the use of curl (the libraries are not and will not be installed on the machine this needs to run).

Pseudo-code:

1. Process 2 args

2. Put args into template URL: http://api.somesite.com/apikey=ARG1&amp;command=ARG2

3. Do POST on generated URL

4. Consume response

My Google and SO searches haven&#39;t yielded anything on this matter.

Simple C example of doing an HTTP POST and consuming the response

I&#39;m getting them on my links in my head.

`GET https://fr.s.us/js/jquery-ui.css net::ERR_INSECURE_RESPONSE`

`GET https://fr.s.us/js/jquery-1.9.1.min.js net::ERR_INSECURE_RESPONSE`

`GET https://fr.s.us/js/jquery-ui.js net::ERR_INSECURE_RESPONSE`

Someone please enlighten me on these jquery console errors..

    Failed to load resource: net::ERR_INSECURE_RESPONSE 

Console errors. Failed to load resource: net::ERR_INSECURE_RESPONSE

I just notice Firefox console outputs the following error for every single .js/.coffee file in my project (even the packages).

    -file- is being assigned a //# sourceMappingURL, but already has one

Chrome&#39;s console doesn&#39;t show anything. I tried deleting all the .map files and clearing Firefox&#39;s cache but I&#39;m still getting the errors.

file is being assigned a //# sourceMappingURL but already has one

How can I verify my XPath?

I am using Chrome Developers tool to inspect the elements and form my XPath. I verify it using the Chrome plugin XPath Checker, however it does not always give me the result. What is a better way to verify my XPath.

I have also tried using Firebug to inspect the bug and also using the FirePath to verify. But does Firepath also verify the XPath.

My last option would be to use the Selenium WebDriver to confirm my XPath. 

How to verify an XPath expression in Chrome Developers tool or Firefox&#39;s Firebug?

I find it odd that `input type=&quot;date&quot;` is still not supported in Firefox after all of this time.    In fact, I don&#39;t think they added in much (if any) of the HTML 5 new types on an input element.  Not surprised that it is not supported in IE10.  So, my question is...

How to get `type=&quot;date&quot;` on an `input` element working without adding, yet another, .js file (namely `jQueryUI` DatePicker Widget) just to get a calendar/date for only IE and Firefox Browsers?  Is there something out there that can be applied somewhere (CDN perhaps?) that will make this functionality work by default in Firefox and/or IE Browsers??  Trying to target IE 8+ Browsers and for Firefox, doesn&#39;t matter, newest version (28.0) will be fine.

UPDATE: Firefox 57+ supports input type=date

How to get HTML 5 input type=&quot;date&quot; working in Firefox and/or IE 10

On Firefox 28, I&#39;m using `&lt;input type=&quot;number&quot;&gt;` works great because it brings up the numerical keyboard on input fields which should only contain numbers.

In Firefox 29, using number inputs displays spin buttons at the right side of the field, which looks like crap in my design. I really don&#39;t need the buttons, because they are useless when you need to write something like a 6~10 digit number anyway.

Is it possible to disable this with CSS or jQuery?

Hide Up &amp; Down Arrow Buttons (Spinner) in Input Number - Firefox 29

I&#39;m trying to make a simple cross-origin request, and Firefox is consistently blocking it with this error: 

&gt;Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at [url]. This can be fixed by moving the resource to the same domain or enabling CORS. [url] 

It works fine in Chrome and Safari. 

As far as I can tell I&#39;ve set all the correct headers on my PHP to allow this to work. Here&#39;s what my server is responding with 

    HTTP/1.1 200 OK
    Date: Mon, 23 Jun 2014 17:15:20 GMT
    Server: Apache/2.2.22 (Debian)
    X-Powered-By: PHP/5.4.4-14+deb7u8
    Access-Control-Allow-Origin: *
    Access-Control-Allow-Methods: GET, POST, OPTIONS
    Access-Control-Allow-Headers: Content-Type
    Access-Control-Request-Headers: X-Requested-With, accept, content-type
    Vary: Accept-Encoding
    Content-Length: 186
    Content-Type: text/html

I&#39;ve tried using Angular, jQuery, and a basic XMLHTTPRequest object, like so:
    
    var data = &quot;id=1234&quot;
    var request = new XMLHttpRequest({mozSystem: true})
    request.onload = onSuccess;
    request.open(&#39;GET&#39;, &#39;https://myurl.com&#39; + &#39;?&#39; + data, true)
    request.setRequestHeader(&#39;Content-Type&#39;, &#39;application/x-www-form-urlencoded&#39;)
    request.send()

...and it works in every browser except  Firefox. Can anyone help with this?

Firefox &#39;Cross-Origin Request Blocked&#39; despite headers

How to increase code fonts in Firefox developer tools?
I know that there is a zoom function but I want to set the font size only for the code.


Increase code font size in firefox developer tool

I am developing a new Firefox addon that intercept all Firefox&#39;s network traffic (http(s) requests with `http-on-modify-request`)

With my current code, I am able to separate requests coming from web-pages/tabs and all the other components (RSS feed updates, XHR requests from XPCOM components, extensions, extensions manager, etc.)

I would like to identify who initiate a request other than the tab&#39;s traffic with precision not just the whole group? (RSS, XPCOM components, extensions, extensions manager, etc)

**Example:** a hypothetical custom variable `requestRequestor` would have a value to identify a specific addon or RSS update etc.

I found this similar [question](https://stackoverflow.com/questions/20855939/identify-requests-coming-from-pageworker) but without a solution.

**Current code to identify the whole group ([getting the browser that fires the http-on-modify-request notification][1]) is:** 


    Components.utils.import(&#39;resource://gre/modules/Services.jsm&#39;);
    Services.obs.addObserver(httpObs, &#39;http-on-modify-request&#39;, false);
    //Services.obs.removeObserver(httpObs, &#39;http-on-modify-request&#39;); //uncomment this line, or run this line when you want to remove the observer
    
    var httpObs = {
        observe: function (aSubject, aTopic, aData) {
            if (aTopic == &#39;http-on-modify-request&#39;) {
                /*start - do not edit here*/
                var oHttp = aSubject.QueryInterface(Components.interfaces.nsIHttpChannel); //i used nsIHttpChannel but i guess you can use nsIChannel, im not sure why though
                var interfaceRequestor = oHttp.notificationCallbacks.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
                //var DOMWindow = interfaceRequestor.getInterface(Components.interfaces.nsIDOMWindow); //not to be done anymore because: https://developer.mozilla.org/en-US/docs/Updating_extensions_for_Firefox_3.5#Getting_a_load_context_from_a_request //instead do the loadContext stuff below
                var loadContext;
                try {
                    loadContext = interfaceRequestor.getInterface(Components.interfaces.nsILoadContext);
                } catch (ex) {
                    try {
                        loadContext = aSubject.loadGroup.notificationCallbacks.getInterface(Components.interfaces.nsILoadContext);
                        //in ff26 aSubject.loadGroup.notificationCallbacks was null for me, i couldnt find a situation where it wasnt null, but whenever this was null, and i knew a loadContext is supposed to be there, i found that &quot;interfaceRequestor.getInterface(Components.interfaces.nsILoadContext);&quot; worked fine, so im thinking in ff26 it doesnt use aSubject.loadGroup.notificationCallbacks anymore, but im not sure
                    } catch (ex2) {
                        loadContext = null;
                        //this is a problem i dont know why it would get here
                    }
                }
                /*end do not edit here*/
                /*start - do all your edits below here*/
                var url = oHttp.URI.spec; //can get url without needing loadContext
                if (loadContext) {
                    var contentWindow = loadContext.associatedWindow; //this is the HTML window of the page that just loaded
                    //aDOMWindow this is the firefox window holding the tab
                    var aDOMWindow = contentWindow.top.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebNavigation).QueryInterface(Ci.nsIDocShellTreeItem).rootTreeItem.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindow);
                    var gBrowser = aDOMWindow.gBrowser; //this is the gBrowser object of the firefox window this tab is in
                    var aTab = gBrowser._getTabForContentWindow(contentWindow.top); //this is the clickable tab xul element, the one found in the tab strip of the firefox window, aTab.linkedBrowser is same as browser var above //can stylize tab like aTab.style.backgroundColor = &#39;blue&#39;; //can stylize the tab like aTab.style.fontColor = &#39;red&#39;;
                    var browser = aTab.linkedBrowser; //this is the browser within the tab //this is what the example in the previous section gives
                    //end getting other useful stuff
                } else {
                    Components.utils.reportError(&#39;EXCEPTION: Load Context Not Found!!&#39;);
                    //this is likely no big deal as the channel proably has no associated window, ie: the channel was loading some resource. but if its an ajax call you may end up here
                }
            }
        }
    };


  [1]: https://developer.mozilla.org/en-US/Add-ons/Code_snippets/Tabbed_browser#Getting_the_browser_that_fires_the_http-on-modify-request_notification



How to identify who initiated the http request in Firefox?

The [timing section of the Firefox Network Monitor documentation][1], &quot;Blocked&quot; is explained as:

&gt; Time spent in a queue waiting for a network connection.
&gt;
&gt; 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.

[![enter image description here][2]][2]

Is this the browser waiting for the OS? Was does &quot;Blocked&quot; mean here?


  [1]: https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor#Timings
  [2]: https://i.stack.imgur.com/zlz6j.png

Content Type	Original Author	Original Content on Stackoverflow
Question	jl6	View Question on Stackoverflow
Solution 1 - Http	wbamberg	View Answer on Stackoverflow
Solution 2 - Http	vossad01	View Answer on Stackoverflow
Solution 3 - Http	BeetleJuice	View Answer on Stackoverflow
Solution 4 - Http	zb226	View Answer on Stackoverflow
Solution 5 - Http	succerror	View Answer on Stackoverflow

Can I prevent the Firefox developer tools network panel from clearing on page reload?

Http Problem Overview

Http Solutions

Solution 1 - Http

Solution 2 - Http

Solution 3 - Http

Solution 4 - Http

Solution 5 - Http

Plotting a list of (x, y) coordinates in python matplotlib

ImportError: No module named MySQLdb

Attributions