bc100-autofill/bg.js

browser.runtime.onInstalled.addListener((ev) => {
    if (ev.reason == "update") {
        updateIsSignificant(ev.previousVersion).then(
            v => {
                if (v) launchInfoPage();
            }
        )
    } else if (ev.reason == "install") {
        browser.runtime.openOptionsPage()
    }
})

async function updateIsSignificant(previousVersion) {
    const significantUpdates = ["0.1.0", "0.2.0", "0.3.0"];
    let currentVersion = (await browser.management.getSelf()).version;
    return (currentVersion in significantUpdates) || currentVersion.endsWith('0');
}
function launchInfoPage(){
    browser.tabs.create({url: "/changelog.htm", active: false})
}