Over the past few years, browsers' built-in popup blockers have done a pretty good job at blocking popups, but in recent times websites have been getting more tricky in circumventing browser's popup blockers with many being activated simply by clicking on a page. I have been testing popup blockers for Vivaldi, Chrome and Firefox and without doubt (in my opinion and many others), the best is Poper Blocker. It also blocks popunders and overlays. You can also whitelist any site, if needed, although I haven't found the need as it is very accurate at doing its job. Direct links for Vivaldi, Chrome & Firefox addons. Do you find this popup blocker as good as I do?
Indeed, I would have never thought, that I would have to install a popup blocker ever again, but it has become unbearable lately. Absolutely, it works 100%. I only have to whitelist webpages, where I have to login via Facebook.
If you go to cnn.com That webpage tries to make your browser connect to all these domains sharethrough.com bing.com outbrain.com imrworldwide.com criteo.com bounceexchange.com krxd.net turner.com usabilla.come googletagservices.com optimizely.com chartbeat.com cnn.io rubiconproject.com giga.com yieldmo.com amazon-adsystem.com ugdturner.com fastly.net There's all your junk content that bogs down your browser, multiply that by the number of tabs. If your browser only loads cnn.com there's no ads, no popups, just the news. I use an android browser that doesn't load anything from 3rd party domains, but lists them all so you can choose to unblock any that are required for functionality and then you can save that configuration.
Their privacy policy is interesting. https://addons.mozilla.org/en-US/firefox/addon/poper-blocker-pop-up-blocker/privacy/
Indeed, funny how many times they stress out, that they collect Non-Personal Information (IP, GEO, URLs, clickstream). Luckily it can be disabled, at least they claim so.
Installed, disabled the collecting data, opened a webpage (where I know is an overlay ad), nothing was blocked, uninstalled, end of story. They have pretty disturbing uninstall survey, to my liking.