browser_action
manifest key in the extension's manifest.json
file:default_popup
is defined, a popup will be opened and the defined html page will be loaded, when the button is clicked. Additionally, you can use the browserAction
API in your background script to interact with the button to modify badge text, icon, title or its enabled state.compose_action
manifest key in the extension's manifest.json
file:default_popup
is defined, a popup will be opened and the defined html page will be loaded, when the button is clicked. Additionally, you can use the composeAction
API in your background script to interact with the button to modify badge text, icon, title or its enabled state.message_display_action
manifest key in the extension's manifest.json
file:default_popup
is defined, a popup will be opened and the defined html page will be loaded, when the button is clicked. Additionally, you can use the messageDisplayAction
API in your background script to interact with the button to modify badge text, icon, title or its enabled state.CloudFile
API. These providers can be managed in Thunderbird's Composition options:menus
API allows modifying Thunderbird's menus by adding or overriding menu items. The menu items can be added to different menus based on the provided context
type. The following values are currently supported:tab
message_list
folder_pane
link
selection
editable
,
password
image
,
audio
,
video
page
,
frame
frame
context applies, otherwise the page
context. Limited to content areas.all
tab
.