Zen browser coapp detection

[namaelsan]

Your question

Im using zen browser as a flatpak. I want to use vdh but even though i have the coapp installed, the extension doesnt detect it. I saw that the installer did some tweaks to the brave, firefox etc. flatpaks, i tried to dig them up myself with flatseal but the only change i saw there was that the ~/.local/share/vdhcoapp:ro option was added to the filesystems. Even though i did the same to zen browser, the extension still cant detect the coapp. So i was wondering if i could learn what those tweaks were so i could apply them myself, some help would be appreciated :)
edit:
i also ran the command "flatpak permission-set webextensions net.downloadhelper.coapp io.github.zen_browser.zen yes" but the outcome is the same

Addon & CoApp version and details

version: 9.1.0.44
target: mozilla
channel: stable
lang: en-US
coapp: {"found":false,"error":"No such native application net.downloadhelper.coapp"}
license: {"unneeded":true}
platform: x86-64 linux
UA: Mozilla/5.0 (X11; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0
{
"view_options": {
"all_tabs": false,
"low_quality": false,
"sort_by_status": true,
"sort_reverse": false,
"show_button_clean": true,
"show_button_clean_all": false,
"show_button_convert_local": false,
"hide_downloaded": false
},
"open_count_store": 2
}