Noticed that with a recent update there’s now a jigsaw puzzle in the popup panel, but doesn’t have a tooltip for what it is. What is it?
A few thoughts on uM (thanks for it, btw!):
- When adding new icons/buttons, such as the recently added puzzle piece, I recommend doing so in a way that doesn’t shift others around if at all possible. After using this for the past few years, I’ve developed muscle memory for doing things, and I’m now constantly going to the wrong spot to click the lock/erase/refresh buttons since they’ve moved to the right a bit. Probably too late now to do anything about it in this case, but something to consider in the future.
- After some discussion in this thread (the main discussion about this starts at this post), it seems a very useful ability you could add would be to whitelist domains for referers being sent TO the domain in addition to the current ability to whitelist referers coming FROM it, as well as the option to notify when it’s activated.
- Another useful ability would be to be able to set spoofing rules, so it could be used to set certain sites (e.g. WSJ) to always be spoofed to look like google.com is the referer, which would allow it to take over the functionality provided by add-ons like Bypass Paywalls (as it is, until I realized the cause, I was often having content blocked from me due to this even if I was coming from google, since I use header spoofing, so a warning about that when enabling this might be a good idea).
Hi all, I’m rather new to uMatrix but I find it quite good.
I’ve learned something and could manage nearly all situation up to now.
I’ve a problem with couple of sites.
Usually, with a new site, I check what is not working, then I open the addon grid and found the disabled items (ping or red).
I then start to enable, one by one, what seems to make sense and try again.
There are anyway some website (a few) that with all enable are not working.
It happened today with a page on bondora.com and one on transferwise.com
On the first there are a couple of calendar icons that do not work at all,
on the second a chat icon with a circle (loading …) below that continue to rotate.
Both have the grid all red (where there are items) excluding googletagmanager.com and linkedin.com.
Both work if I open them in another browser (without a blocker).
My feeling is that there is some other domain involved that is not showed in the grid (neither in the umatrix register).
Am I correct and there is a way to see all domains involved in the page ?
Or do I miss something ?
BTW, with uMatrix I also use AdBlockPlus, HTTPSEverywhere and Privacy Badger.
I also tried to disable all of them but with same problem.
TIA
I’m running Win 10 using Firefox 63.0.1 64 bit and latest uMatrix. I don’t know why but the uMatrix icon is gone from the toolbar and I don’t know how to bring it back. Sites won’t load unless I disable uMatrix from in the add-on settings. I tried reinstalling the uMatrix add-on but that didnt help. How do I fix this please?
Just mentioning that for a longer period of time everything goes well with uMatrix. No problems, whatsoever.
Thanks, @gorhill, again!
Have a nice december! 
I am currently using AdBlockPlus in addition to uMatrix (V1.3.16 on FF 63.0.3 Linux Mint), mainly for its ability to block certain annoying page elements on some websites.
Examples are from its filter list are:
heise.de##.a-paternoster-centered.a-paternoster-container
heise.de##.a-paternoster-clip
heise.de##.a-paternoster-ad
||cdn2.spiegel.de/images/image-57228*.jpg$domain=www.spiegel.de
Despite having spent considerable time on trying to figure out a filter rule to achieve the same effect with uMatrix’ “My Rules” alone, I didn’t succeed.
Hence now here my questions:
Can this be done?
And if so, how how exactly would the filter rule entry need to look like?
Thank you
Not in uMatrix.
You can try uBlock Origin where you can use “dynamic filtering” similar to uMatrix and easily create ABP-like hidding rules
Hi, I have some issues with uMatrix on Firefox for Android. For some websites, the panel doesn’t show third-party domains at all, while they definitely are present. This means that some broken websites cannoted be adjusted.
Has anybody else had this problem as well and what might be the fix?
I didn’t see any responses, so I thought I’d share my thoughts.
Essentially, I don’t understand why you want to use umatrix.
It seems that your primary concern is ad blocking, which uBlock is very capable of doing.
You also mention that umatrix breaks pages “a lot” - I’ve never used umatrix, and this is the main reason.
Your approach to unbreaking sites while using umatrix (allowing scripts generally for each broken site) suggests to me that you would probably be best served by using only uBlock.
I don’t want to seem condescending, but it seems like umatrix requires both a greater understanding of how browsers work than you have and a greater commitment to being involved with what your browser does every time that it’s used than want to make.
I doubt there will ever be a wiki for umatrix like there is for uBlock; umatrix seems to be intended for users who equipped want to review its source code before installing it. (Hence the lack of a wiki.)
If you do go back to uBlock without umatrix, consider adding some of the AdGuard lists. You may even want to visit AdGuard’s list site to see all of what they offer.
If you’re interested, I use these filter lists from AdGuard:
AdGuard Base filter
AdGuard Mobile Ads filter
AdGuard Spyware filter
AdGuard Annoyances filter
AdGuard Social Media filter
AdGuard Experimental filter
Just a passing idea:
It looks like those first three filters might be replaced by:
heise.de##[class|=‘a-paternoster’]
That’s what I’d try in uBlock.
Kick ABP to the curb! 
You may have moved past this, but for your missing icon it’s probably in the overflow menu. Select customize from the main menu, and everything that’s hidden there will be displayed.
Also, it sounds like you should be starting with uBlock Origin.
Any chance this happens on first tab of freshly opened Firefox only? There is known bug where extensions fail to work on first tab. Similar issue: https://github.com/uBlockOrigin/uMatrix-issues/issues/95
Wow thanks. I wasn’t aware uMatrix issues were discussed at that page. This is definitely a first tab problem, thanks for pointing this out to me!
Does uMatrix support patterns with wildcard character in it (for ex: example.com *.example.org xhr allow )? I tried one pattern of this kind but, it didn’t work whereas, replacing *.example.org with * worked.
Wildcards are implicit, no need for asterisk - all subdomains are included.
In Google Chrome, one can set a keyboard shortcut to open uMatrix up (open uMatrix to the grid-view where one can allow/disallow items). There is no keyboard shortcut ability in Firefox.
Is the fact that there is no keyboard shortcut for Firefox a “Firefox bug” or a feature that gorhill has not implemented into the uMatrix version of Firefox?
This was Firefox bug for some time https://github.com/uBlockOrigin/uMatrix-issues/issues/37 but now it’s “not enough free time” bug 
I also don’t think Firefox support “Activate the extension” action for shortcuts.
To make sure I understood your post correctly: it is a “bug” with Firefox then, not something that has been left out of uMatrix?"
I dont know why I can’t open webpages anymore if uMatrix is enabled. I am on firefox 74 linux version.