This brief help document provides guidance on how to get the most out of the Modify Headers extension.
Table of Contents
- What’s New?
- FAQ
- Quickstart
- Adding Headers
- Modifying Headers
- Filtering Headers
- Using Multiple Instructions
- Reordering headers
- Configuration Options
Donate
Please consider making a contribution to support the development of Modify Headers.
Defects and Enhancement Requests
Please post bugs and enhancement requests to the Modify Headers bugzilla.
I’m very appreciative of the work you’ve done on this extension, but
aaaaaaaaaaaaaaaaaaaaargh
you’ve made it impossible to open it in a tab on OS X now.
(
Or am I missing something?
Matt, Thanks for taking the time to provide feedback.
I switched the window to be a prefwindow instead of a standard dialog. This was so I could take advantage of the toolbar at the top of the page that prefwindow provides. However, there was a problem with prefwindow on Macs where the window resizes to the content even when opened as a tab.
I’m working on tracking down a way of overriding this behaviour and restoring the open-as-tab option. Please be patient while this is worked out.
Will do, thanks.
If you can’t do the tab, is there any way of making the window resizable? I have 177 headers in my configuration, with user-agent values that would be much easier to read if the window was larger.
Hi Matt, Please take a look at the beta available at https://addons.mozilla.org/en-US/firefox/addon/967/. I believe I have overcome the problems with Open-As-Tab and making the window resizeable. Please test the beta and provide feedback.
Thanks, pls how do I make it support https sites
Hi Tecky, you may have problems if you access HTTPS sites via a proxy. This defect is being tracked here: https://www.mozdev.org/bugs/show_bug.cgi?id=22493. If you have further comments, please do so on the bug.
Re-sizable window is a must, i have hundreds of headers as well. I do not see the same window that is in the screenshots. There is no configuration tab and help is in a different area. I also work with 20+ windows open so having modify headers in its own tab was great, please go back to that. I would not have gone with the update had I known. If it ain’t broke, don’t fix it!
Scott, I’ve added a blog entry that details the reasons for the changes. The short story is that I wanted to get a release out and had some problems with open-as-tab and resizeable with no solutions. I choose to release anyway and fix them later. Thankfully, I got lucky and managed to work them out in a just a few days. Release 0.6.9 has been uploaded to Mozilla Addons and is pending approval.
Hi! I really like the MH extension, actually many of us have to use it in Poland if we want to get rid of compression applied by the ISP… Anyway, it would be perfect to have the button somewhere in the toolbar (e.g. as for AdBlock Plus) to have the possibility of immediate turn on/off all rules. I mean just the functionality of “Enable All”/”Disable All” under a button directly in the browser, without going into menus.
Do you think it is possible? Is it a big effort to implement it?
Thanks in advance!
Hi Darek, I’m very glad you like the extension. The feature you mention should be straightforward and has already been requested here: https://www.mozdev.org/bugs/show_bug.cgi?id=23473. One obstacle to a status/addon bar icon is that I am not a good designer and have terrible ideas when it comes to graphic design.
I do want to get a logo for Modify Headers and will very soon be looking for a designer to help out.
Just got the update and very pleased to see MH open in a new tab.
Thanks!
Hi,
There is a problem from the last update 0.7.1.0:
I usually keep the status bar (add-on bar) hide, but from this update it reappears every time a new window is open or Firefox restart.
Also “open in tab” has a issue to, I fix it from “about:config” modifyheaders.config.openNewTab=true
Cheers!
I created a bug for the toolbar problem: https://www.mozdev.org/bugs/show_bug.cgi?id=24593. Please add a comment describing your platform and Fx version.
As for “open in tab”. I tested this on Mac and PC with no problems.
Version 0.7.1.1 provides a fix for the addon toolbar.
Hi Gareth,
Thank you very much for that fix
Modify Header is not anymore under Tools pull down menu. It’s at Add-ons (active_not disabled). Under options its Enabled. But when you open for example South Park or Jon Stewart Show the the video it’s not available for viewing in Canada. This after Nov.27.
The menu option moved to Tools -> Web Developer -> Modify Headers. Use the icon in the top left of the window to start/stop the addon. There is also a quick menu in the addon toolbar.
Take a look at the Quickstart page.
Modify-Headers no longer run as when after entering
the different x-Forwarded it is impossible as before
to obtain the case ” always on” as Headers in mark in
blue and no longer useful.
Excuse my bad english as I am living in Belgium.
Thanks for an answer
Yours truly
“Always On” was replaced by a Start/Stop button due to popular demand. Click the icon in the top left of the Modify Headers window to start/stop.
Hi Gareth,
I\’m using modify headers 0.7.1.0 with FF 8.0 and can\’t seem to watch the daily show anymore. Earlier in the day before I \’updated\’ it was working fine. After restarting in the afternoon I can no longer watch the daily show. How can I rectify the problem?
thanks
Make sure you have clicked the new icon in the top left of the window. This will start Modify Headers – the icon will turn red. The addon will continue to be on until you press the same button to stop, the the icon will return to a grey colour.
Oh no, I’m lamenting loss of always-on.
I really dislike the start-stop thing; I have to do it for every new window that opens.
I wonder if I can try to roll back to an old version of the plugin. Which version number should I look for?
some background:
- I’m in the UK and I always use FireFox to watch American stuff (like Daily Show, Colbert Report, South Park)
- I’m using Mac OS X Lion.
Thanks for all your hard work, Mr Developer (aka Mr Hunt)
Gareth,
I feel it’s really important to always be able to see the status bar, as phishing is so prevalent. When the stop/start bar appears it seems to kill the status bar (the one showing the full URL of a link when you hover over it, for example)
Can you PLEASE PLEASE PLEASE PLEASE give us the option to use always-on, and disable the start-stop bar. (Pretty-please with sugar on top)
?
Hi Chris, the “start/stop bar” as you call it is actually the standard Firefox addon bar – Modify Headers adds a button to it. There is a bug where the addon bar is displayed with every new window opened. This bug is fixed in version 0.7.1.1 (http://bit.ly/tS7MRX) and should be approved by Mozilla soon.
Finally, please understand that the Start/Stop button is the always-on feature under the covers but with a different UI. Once you press “Start”, Modify Headers will continue to be on until you press “Stop”, even between restarts. Please remember that Modify Headers is primarily a web developer tool. Web devs needed a better way to enable and disable the addon while they worked.
As for the addon bar covering the status bar, that surprises me. I took a look and can see the URL displayed above the addon bar when I hover over a link.
Hi Gareth!
I love this addon! One thing I can’t achieve is header without “HTTP_” prefix. I’m writing a mobile site and I need to add UAProf headers like: “X-WAP-PROFILE” or “19-profile”. I see that when I create header called “PROFILE” then on the hearers list HTTP_PROFILE is added. Can you give an option for not adding this prefix?
cheers
tk1
Hi tk1,
Actually Modify Headers is not adding this prefix. I assume you are listing the headers received server side using PHP or some other platform. The “HTTP_” prefix is added by the server side platform to identify this is a HTTP request header. For example you configure PROFILE in Modify Headers. The server receives PROFILE in the HTTP headers, but PHP lists it as HTTP_PROFILE.
I hope that makes sense.
Perhaps I’m missing something, but I followed the quick start tutorial and then activated Modify Headers, and I don’t see anything different when browsing? Perhaps I assumed this add-on does something that it does not – shouldn’t I see what an iPhone would see when I add the iPhone profile in the tutorial? I don’t see any explanation on this site as to what I ‘should’ be seeing. I certainly don’t understand the mystic details of headers, but want to do some mobile browser testing.
Scott. You will only see something different if the website you visit has a mobile version. When I get some time, I’ll update the quickstart and add an example of the difference you will see.
I remember with older modify header versions, this extension was active by default. Now I have to manually activate it and unfortunately sometimes I forget. Is there an internal configuration switch that can be set perhaps via the FF about:config to have the extension enabled by default?
Modify Headers was never enabled by default. There used to be two ways it was enabled:
This was changed to a Start/Stop button so there is only a single way for the add-on to be enabled. If you want Modify Headers to be active all the time, simply click the Start button so the icon goes from grey to red.