I've been through the Uninstall process outlined and it's not made any difference. Should the adblocker icon definitely appear on the toolbar?
Fresh diagnostics below
executable_path=/Applications/Avast Secure Browser.app/Contents/MacOS/Avast Secure Browser
profile_path=/Users/mike/Library/Application Support/AVAST Software/Browser/Default
os_version=macOS Catalina v10.15.5 (x64)
host_prefix=
browser_version=83.0.21.98 (Official Build (64-bit))
cgid=
cid=
uid=
Channel: stable
OS language:
Browser language: en-GB
Search Engine URL:
https://www.google.com/search?client=avast&q={searchTerms}Enabled extensions:
ahfgeienlihckogmohjhadlkjgocpleb : Web Store : 0.2
kmendfapggjehodndflmmgagdbamhnfd : CryptoTokenExtension : 0.9.74
mfehgcgbbipciphmccgaenjidiccnmng : Cloud Print : 0.1
mhjfbmdgcfjbbpaeojofohoefgiehjai : Chrome PDF Viewer : 1
nkeimhogjdpnpccoofpliimaahmaaome : Google Hangouts : 1.3.15
pkedcjkdefgpdelpbcmbmeomcjbeemfm : Chrome Media Router : 8320.407.0.1
Disabled extensions: