At least with JS, if it leaks or has security breach, the browser's developer can fix it without waiting for a 3rd party, or I can use a different browser.
Same arguments can be made for Flash: Plugin's developer can fix it without waiting for browser. Disable the plugin and use the same browser.
Conclusion: makes no difference conceptually.
Not exactly comparable. Flash, at its height, had pretty much the "multimedia in browser" market cornered with draconian vendor lock-in effects. They didn't need to hurry that much with fixing issues, because what are you gonna do if you are not satisfied with the Adobe Flash plugin? Run your favourite Flash game with Microsoft Silverlight? Use the open-source plug-in that could only run some Flash 1.0 animations?
At least with browsers you can easily switch vendors (the whole point of standardization and techs like WASM), or even fork your own.
Even if I don't like Apple or Steve Jobs that much, I must say they did one great thing killing off Flash by not allowing it on the original iPhone.
Oh, and guess what? We now have no browser competition because all the relevant parts are in the Flash Player and good luck motivating Adobe to fix issues with it now that it's basically a requirement to run a browser. Oh, and now they could charge everyone to access it if they want.
I want to live in your world!
In modern OSes, you could slap a sandbox or container-ish construction around Flash. If it had a bug, it would be contained.
In principle, a minimal browser that defers to isolated plugins would be the more secure design. In practice, the plugins were buggy and insecure of course, but this was accidental.
If Flash were open source, and/or had just as much effort put into it as current browsers, it would be at least as secure.
The only reason the monolithic kitchen sink that a modern browser is is secure (and fast) is that so many brilliant people have been putting so much hard work into it (and Google and Apple so much money).
No. They blocked it because it sucked. Horrible for battery, horrible for accessibility, performance wasn't great, and security issues galore. Don't forget, iPhone shipped without Flash before the app store even existed. When iPhone was first launched, Apple literally told developers to make web apps for it instead of providing native apps. It wasn't until iOS 2.0 that native apps were possible.
Edit: In case it is not clear, Angry Birds uses the Starling Platform, which uses Stage3D, which uses Adobe AIR, which uses the same technology as Flash, and is written in the same ActionScript3 environment.
AS3 spawned way too many OOP practices in the Flash world for my liking, it was the most naive way to code games I've seen until people started doing the same in JS. Angry Birds is so simple a game it could waste 90% of the system's resources and still run smoothly.
The build pipeline for AIR is also terrible, with XML configuration and arcane documentation and plenty of non-documented behaviors. I once had to maintain a Flash extension, ExtensionBuilder is as bad as a toolchain can get.
I'm so glad Flash is dead :)
Nails in the coffin.
Non-game related, this might actually be a good thing. But coming from a game development background, this is a huge step back, both for game developers and gamers who want to play straight in the browser. But as said, we will see how inconvenient they make it.
It came as no suprise to me when Flash and the iPhone never happened.
The main idea of killing Flash was because some websites completely ran on it, which is bad. But games never was an issue, and never will be.
Battery life, system resources, downloading assets, ..., it's all the same if you use either Flash or JavaScript.
Newsflash: Apple didn't block Flash because it is "bad", they blocked it because they wanted you to go through their app store
Newsflash: Games written for Flash (in ActionScript3) also run on Android and iOS. It even became "Best Mobile Application Development product" of 2014 and 2015.
They say Flash advertisement banners were annoying, so what do you think about those JavaScript popup banners that pop in the middle of the page you are reading, saying "Please subscribe to our mailing list"?
I you develop a game for Flash, it runs consistently in the Flash plugin. If you develop a game in JavaScript, you need to test it in all browsers you want to support. And yes, they are all different. And still gives troubles so many years later. Surprising? Not for old farts like myself.
But no worries. I looked at my google analytics for the past few years. Most visitors moved to Chrome. Flash plugin installed percentage: remained the same.