This Firefox-Add-on reloads a selected tab to get fresh content.
The add-on never reloads about-Pages.
The add-on reloads only pages which are unreloaded for an hour (default setting)
The add-on never reloads PDFs.
The add-on adds a button to the browser's toolbar. The button activates and deactivates tab reload on the domain of the URL.
The button has a colorized hourglass if tab reload is active on the domain. Otherwise the icon is a grey x.
The reload timeout value is configurable in the preferences panel on the about:addons-page (default: 60 minutes).
Tabs can optionally be reloaded with fresh content. (default: false) Beware: If this is activated, current scroll position can not be kept.
https://developer.chrome.com/extensions/tabs https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/browserAction