SUMMARY STEPS TO REPRODUCE 1. open the Proxy --System Settings 2. select Use manually specified proxy configuration and apply(I entered the correct ip and port,It work well on my Windows10 computer) 3. No matter what browser I use, and curl tool, I can't get my curl tool to be proxied. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Linux/KDE Plasma: Linux version 5.8.0-45-generic (buildd@lcy01-amd64-010) (gcc (Ubuntu 10.2.0-13ubuntu1) 10.2.0, GNU ld (GNU Binutils for Ubuntu) 2.35.1) #51-Ubuntu SMP Fri Feb 19 13:24:51 UTC 2021 (available in About System) KDE Plasma Version: kde-plasma-desktop/groovy 5:106ubuntu1 amd64 KDE Frameworks Version: plasma-framework/groovy,now 5.74.0a-0ubuntu1 amd64 Qt Version: qt5-gtk-platformtheme/groovy,now 5.14.2+dfsg-6 amd64 [已安装,自动] qt5-image-formats-plugins/groovy,now 5.14.2-2 amd64 [已安装,自动] qtchooser/groovy,now 66-2build1 amd64 [已安装,自动] qtspeech5-flite-plugin/groovy,now 5.14.2-2 amd64 [已安装,自动] qttranslations5-l10n/groovy,groovy,now 5.14.2-2 all [已安装,自动] qtvirtualkeyboard-plugin/groovy,now 5.14.2+dfsg-2 amd64 [已安装,自动] qtwayland5/groovy,now 5.14.2-2 amd64 [已安装,自动] ADDITIONAL INFORMATION
*** This bug has been marked as a duplicate of bug 398584 ***