Do more on the web, with a fast and secure browser!
Download Opera browser with:
DNAWIZ-26931 still not fixed → https://forums.opera.com/post/142021 
@leocg I have, but my comment have been deleted
I get newsfeed from Opera blogs in this feed, the address is an HTTP link.
If I write an answer in this blog but go in via an HTTPS address, the post is gone (all)
Example:
https://blogs.opera.com/desktop/2018/03/opera-53-0-2893-0-developer-update/
http://blogs.opera.com/desktop/2018/03/opera-53-0-2893-0-developer-update/
A blog post and two different commentary trees.
This is stange, better only HTTPS and all HTTP redirect to https.
And my comments from this blog have been deleted…
update-alternatives --display gnome-www-browser
gnome-www-browser - manual mode
link best version is /usr/bin/opera-developer
link currently points to /usr/bin/opera-developer
link gnome-www-browser is /usr/bin/gnome-www-browser
update-alternatives --display x-www-browser
x-www-browser - manual mode
link best version is /usr/bin/opera-developer
link currently points to /usr/bin/opera-developer
link x-www-browser is /usr/bin/x-www-browser
Workaround for me, i edit the $HOME/.local/share/applications/exo-web-browser.desktop
[Desktop Entry]
Version=1.0
Type=Application
Exec=x-www-browser %u
Icon=web-browser
StartupNotify=true
Terminal=false
Categories=Network;X-XFCE;X-Xfce-Toplevel;
OnlyShowIn=XFCE;
X-XFCE-MimeType=x-scheme-handler/http;x-scheme-handler/https;
Name=Web Browser
Comment=Browse the web
Hidden=true
Original
Exec=exo-open --launch WebBrowser %u
Since Opera 53.0.2885.0 developer (also Opera 53.0.2893.0) i get a system message when opening a URL if it comes from an external program (IRC link, help link from LibreOffice, etc.).
German:
Der vorgegebene Internetnavigator konnte nicht gestartet werden.
Eingabe-/Ausgabefehler
English:
Failed to execute default Web Browser.
Input/output error
Site opens, but with the stupid system dialog.
No dialog with Opera developer 53.0.2880.0, Opera stable, Firefox, Vivaldi
The dialog only opens if Opera Dev ⋝ 53.0.2885.0 is the default browser.
command line:
exo-open URL with dialog (exo-open starts the default browser)
opera-developer URL without dialog
OS: Siduction 64bit
DE: Xfce 4.12
Can anybody confirm that, or what is the mistake?
With Opera developer 51.0.2830 works gpu, all my issues from above have been fixed. 
@loup001
Do you have NVIDIA, if so, can you check on opera:gpu if the hardware support is enabled?
And how does the http://slither.io site work for you or very slow?
With me the GPU support Opera Developer 51.0.2809.0 is corrupt (see my posting above).
My result from opera:gpu: Opera_51.0.2809.0_gpu.pdf
OS: Siduction 64bit, NVIDIA 9600 GT (nvidia-legacy-340xx-driver)
@angrypenguin said in New Opera developer 51:
So, try go to opera:flags and enable this flag - Override software rendering list. Restart browser and check again.
Hi @angrypenguin thanks for the tip, but there not help.
And i have previously tested with command line option.
opera-developer --ignore-gpu-blacklist
I have no more idea.
What is the significant modify difference (program code) between Opera 51.0.2796.0 and 51.0.2809.0?
Hi @l33t4opera
$ lsmod | grep nvidia
nvidia 10559488 43
drm 360448 3 nvidia
i2c_core 57344 4 nvidia,i2c_i801,psmouse,drm
$ glxinfo | grep direct
direct rendering: Yes
GL_EXT_depth_bounds_test, GL_EXT_direct_state_access,
GL_EXT_depth_bounds_test, GL_EXT_direct_state_access,
$ grep glx /var/log/Xorg.0.log
[ 35.598] (II) LoadModule: "glx"
[ 35.647] (II) Loading /usr/lib/xorg/modules/linux/libglx.so
[ 38.115] (II) Module glx: vendor="NVIDIA Corporation"
In browser settings the Hardware acceleration was enable.
The command line option did not help.
No problem with:
Opera Dev
51.0.2781.0
51.0.2796.0
broken:
51.0.2802.0
51.0.2809.0
And yes, i testing with new profile.
hi @l33t4opera, i don't found the notice for Google's SwiftShader driver (forum, blog?) but…
Alexs