I have installed the latest version of Fiddler, and copied and pasted the Terminal command from the instructions but it just gives me an error. What am I missing here?
/Library/Frameworks/Mono.framework/Versions/<Mono Version>/bin/mozroots --import --sync
Hi All,
I want to use a file from a remote server in the Gateway tab of fiddler by configuring it as a manual proxy but it's not working for me.
I added the manual proxy with the as below.
Config script: "http://testproxyserver.com/accelerated_pac_base.pac"
I even tried to change the path to the local system folder but it didn't .
Can anyone please advise what I am doing wrong?
Thanks and ,
Sathish.

I needed to capture connect traffic and do it from a script. I created a PowerShell script that downloads fiddler, installs it, modifies SampleRules.js to add a rule to dump only connect traffic, and starts fiddler. Then later with a different script param I stop capturing, dump the connects, quit fiddler, and uninstall it.
The problem is that since doing this anytime I start fiddler now it ONLY capture connects.
How can I get it to go back to capturing everything?
Script is attached, but I gave it a jpg extension since ps1 is not allowed.
Thanks,
Rick
Hello,
I updated Fiddler today and the fonts are way too small on all of our devices. I have observed numerous complaints regarding this issue by others on the Internet.
I just learned on this forum that you do not support downloading a previous version. Too bad, but I understand your policy.
Hope this issue gets addressed soon.
Regards...

https://i.imgur.com/MMCM2Ni.png
As you can see above, im using C# and its returning a Handshake Error (sslStream.AuthenticateAsClient(host)).
This is ONLY occuring if I connect via proxy to ipv4:8888 (Fiddler's Proxy).
If I were to close off fiddler and use another proxy, or no proxy at all, it would work fine.
Honestly clueless as to why its occuring. My library had 1 other connection issue due to incorrectly syncing a stream.read for a statusline check causing fiddler to show a red/yellow icon (https://i.imgur.com/VSSRShi.png) but I sorted that out.
Now im just trying to figure out why this is occuring.
Hi all,
I wanted to upgrade Fiddler to the latest version...
The automatic upgrade failed so I deinstalled the current version and now I'm getting an error message: "Uninstalling the currently installed version of ... failed" .
I cleaned up all the folders and the registry, rebooted, but it still won't install :'(
Thanks for your help!
Stephan
hi respect for fiddler, i am from russia
subj, yes win xp base not support tls 1.2, only third party libraries supoport tls 1.2 on win xp (curl, openssl)
log from fiddler
HTTP/1.1 200 Connection Established
FiddlerGateway: Direct
StartTime: 07:57:56.679
Connection: close
fiddler.network.https> HTTPS handshake to 38.is-mis.ru (for #47) failed. System.IO.IOException Неожиданный EOF или 0 байт из транспортного потока.
I have a machine setup to run automated tests. I have some software, including Fiddler running as scheduled tasks on start up without user required to log in. I can see tests passing, which means traffic goes through Fiddler, as they would fail otherwise. When I log in to that machine, I can see in Task Manager Fiddler running as background process.
But nowhere I can see the traffic. Fiddler is running as background process and I can't find the folder where it stores temp files. I have also tried setting autosave to a file every 5 minutes. And while it works when I run fiddler in UI, no sessions are saved when it runs as background process.

I trying fiddlerCorde in a winform application. I like to capture traffic only for one domain and use filter too but when i surfing to other domain it increase memory used by the application. Is there any solution for purge fiddlercore sometimes?
best regards
Alina
Hi,
I am accessing my visual studio project that resides on my laptop from my android phone. Most of it works but i have a java script file called "<script src="~/Scripts/mbsa_js.js"></script>" that shows up in fiddler with a 404. when i access the same file using visual studio, i get a 200. funny thing is that it accepts "<script src="~/Scripts/mbsa_js.js"></script>" at one point, but in all other calls during this same fiddler process, it shows this "<script src="~/Scripts/mbsa_js.js"></script>" file it shows 404.
This gets weider because when i make up a javascript file name that does not exist like "<script src="~/Scripts/mbsab_js.js"></script>" , "mbsab", fiddler shows up as 200. but,as stated, this file name does not exist, how could fiddler show it as 200 instead of 404??
thanks for any advice and help.