Safari extensions add functionality to Safari, so you can explore the web the way you want. Extensions can show helpful information about a webpage, display news headlines, help you use your favorite services, change the appearance of webpages, and much more. Extensions are a great way to personalize your browsing experience.
Use the App Store to conveniently download and install Safari extensions. All extensions in the App Store are reviewed, signed, and hosted by Apple for your security.
How to install extensions
Safari 12 no longer supports java. As someone mentioned on the apple discussion forums one of the workarounds is to switch to Firefox version v52.9ESR. It is important to (quickly) disable updates within the Firefox preferences or it will update to a newer version that also doesn't support Java. Safari 12 Update. The Safari 12 desktop browser moved to a new model for browser extensions that offers users greater security and performance. It also meant that our original extension was no longer compatible, but with Safari 13 new functionality was thankfully added that enabled us to bring it back. Safari 12 turned off your adblock extension? Keep calm and read this No doubt that there's a lot of cool stuff inside, but we will save the praise for others and instead focus on one change that seriously concerns all AdGuard Browser Extension users: new Safari is breaking all directly downloaded.safariextz extensions.
Start by installing the latest macOS updates to make sure that Safari is up to date. You need Safari 12 or later to get Safari extensions from the App Store.
Find and install an extension:
Open Safari and choose Safari > Safari Extensions from the menu bar.
The App Store opens to the Safari Extensions page, as pictured above. To download and install an extension, click Get or click the price. You might be asked to sign in with your Apple ID.
Click Install.
After the extension is installed, click Open and follow the onscreen instructions provided by the extension.
Then return to Safari to turn on the extension you installed:
Choose Safari > Preferences.
Click Extensions.
Select the checkbox next to the extension's name.
All extensions installed from the App Store are automatically kept up to date.
How to turn off or uninstall extensions
Choose Safari > Preferences, then click Extensions.
To turn off an extension, deselect its checkbox.
To uninstall an extension, select the extension and click the Uninstall button. If you can't determine what an extension does, or you don't expect to use it again, you should uninstall it.
Learn more
Safari no longer supports most web plug-ins. To load webpages more quickly, save energy, and strengthen security, Safari is optimized for content that uses the HTML5 web standard, which doesn't require a plug-in. To enhance and customize your browsing experience, use Safari extensions instead of web plug-ins.
Safari 12, which is part of Apple’s new OS Mojave and which I have just installed for some testing, has in my opinion a fairly major pitfall that will affect many users including I’m afraid your humble servant Mojave tester.
As soon as I finished downloading, installing and began using Mojave, as part of my testing opened up Safari. Instantly I get a pop-up message which you can see above that says “SAFARI NO LONGER SUPPORTS UNSAFE EXTENSIONS”
WTF APPLE?!
I realize Apple thinks this is in our best interest for Safety and Security however….! I had three very useful extensions loaded and that I had been using as part of my Safari (v.11) for years on a daily basis. Now they all were automatically disabled and effectively wiped off my machine. Of course they were working fine a half hour earlier before I did the Mojave upgrade when I was still using Safari 11 (+ Sierra). Theses extensions were quite safe and from reputable sources, and they were extremely useful to me! All had been downloaded from known legit developers but apparently Apple’s gotten much much stricter about Safari extensions for security reasons and want to protect us from bad guys. So the new way is: all Extensions that will work with Safari 12 are now only available in the App Store
Stylus bt bold font. So I start looking in the Safari Extension App Store collection and see what I can find for Gmail / Email… the choices seem pretty paltry and I could not find any with the functions I had wanted which I just lost via this Mojave upgrade. Not too mention many of the extension I see listed seem to be paid extensions one will have to purchase. No longer open source extensions from trust worthy developer that were previously Free.
To give you just one example, one extension I’ve used for years is called Gmail This – It was a useful extension which lets you send any webpage automatically, by copying the link into a new Gmail message which then you just add the person TO its going, and click Send. Its almost instant and saves me about 3 steps (copy the url, compose message in gmail, paste the url….) It was just great for sending someone an article or webpage in half a second, and I used this generally a few times a day. Best 3d cad for mac.
Another useful extension I used is called MailTo extension which fixes clicking a links (which by default will open Apple Mail, which I do not use) and lets one open it Gmail in Safari (11)
Another extension I use Shortens URLs via Goo.gl. See these for example
I looked around the Safari Extensions / App Store that Mojave is showing but really couldn’t find anything that seemed to do the same thing as the ones I had. ARGH!!! Maybe I will find them in future…? But frankly for the moment I see this as a bit of a deal breaker for Mojave, which otherwise I am liking…. so will likely switch back for the present for this one reason to Sierra!
If anyone has located some useful Gmail extensions that work with Safari 12/Mojave, and do some of these tasks, please leave some info about them in a Comment. Meanwhile I will probably Restore my backup of my pre-Mojave setup. One step forward, two steps backward Apple.