@leocg you're a life savior, thanks!

Is there a way to bring back the recently closed tabs or was it removed?

I looked up all the settings and couldn't find any setting that looked like it was related to it.
I used that button multiple times trough-out my day, it is really slowing me down having to go to the history every time I am looking for an specific page that I closed.

The shortcut doesn't cut for me because I would have to reopen tons of pages to find the one I want.

I cant start opera in Kali, when I click on the icon it just doesnt show up.
I tried from the command line and got the following error:

root@KLKali:~# opera
[0826/105810:FATAL:sandbox_linux.cc(180)] Check failed: sandbox::Credentials::MoveToNewUserNS().
#0 0x0000039612de <unknown>
#1 0x000003975a6b <unknown>
#2 0x00000065b172 <unknown>
#3 0x000003163cac <unknown>
#4 0x000002e09236 <unknown>
#5 0x000002e0a437 <unknown>
#6 0x000002e08f50 <unknown>
#7 0x000003d9b1fa OperaMain
#8 0x7f12a67e3730 __libc_start_main
#9 0x00000045bf85 <unknown>

Received signal 6
#0 0x000003960e67 <unknown>
#1 0x7f12a7e31ed0 <unknown>
#2 0x7f12a67f61c8 gsignal
#3 0x7f12a67f764a abort
#4 0x000003960352 <unknown>
#5 0x000003975d2a <unknown>
#6 0x00000065b172 <unknown>
#7 0x000003163cac <unknown>
#8 0x000002e09236 <unknown>
#9 0x000002e0a437 <unknown>
#10 0x000002e08f50 <unknown>
#11 0x000003d9b1fa OperaMain
#12 0x7f12a67e3730 __libc_start_main
#13 0x00000045bf85 <unknown>
r8: 00007fff7ab68300 r9: 00007f129fab9a80 r10: 0000000000000008 r11: 0000000000000202
r12: 000000009a17b701 r13: 000018139a1daa80 r14: 00007fff7ab68a68 r15: 00007fff7ab68a58
di: 0000000000000001 si: 0000000000000001 bp: 00007fff7ab690b0 bx: 0000000000000000
dx: 0000000000000006 ax: 0000000000000000 cx: 00007f12a67f61c8 sp: 00007fff7ab68198
ip: 00007f12a67f61c8 efl: 0000000000000202 cgf: 6d63000000000033 erf: 0000000000000000
trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]

Then I tried to start with no sandbox and opera does start but gives the following errors:

root@KLKali:~# opera --no-sandbox
[0826/105426:ERROR:browser_main_loop.cc(227)] Running without the SUID sandbox.
[0826/105427:ERROR:object_proxy.cc(583)] Failed to call method: org.freedesktop.DBus.Properties.Get: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.InvalidArgs: No such interface 'org.freedesktop.UPower.Device'
[0826/105429:ERROR:sandbox_linux.cc(343)] InitializeSandbox() called with multiple threads in process gpu-process.

Even with the errors it works fine but I need to keep the terminal open while using opera.
I don`t know much about it but my guess is that the energy saving thing is not being able to find Kali energy management system.

Is there any way to fix that? having the terminal open every single time is somewhat annoying...