@Loneylguy thanks for your answer, I already disabled most extensions and clear the cache quite often.
I made some researchs about Opera mini and it seems it was done for smartphones and not computers !?
It is possible that my problems are due to the fact my computer is very old with many unecessary files that slow it

Hello
I am using an old computer with windows 7 and I find Opera slower and slower.
Is there a way to make it less heavy and faster ?
Does Opera team work on a lighter version ?