replacement for firefox?

[Paul74]

Hello,

I have used Falkon (known also as Qupzilla) for a while :
- very fast and reactive
- easy to use

But :
- some problem to display some videos (may be due to flash player....)
- problems to fill  some customer's form
- last version was not delivered by Synaptic but it's Ok  now

I also tried Opera and now I use Vivaldi.

Vivaldi :
- is not the lighter in term of memory used
- parameters easy to modify
- built-in ad-blocker