Opera And Google Chrome Extensions 1

Animation Policy ( Offered by chrome-a11y-extensions ) Run animations only once, or disable animation completely.
Policy Control - JavaScript and Flash blocker ( Offered by rynu.smith ) Block third-party or all resources of style, script, image, font, xmlhttprequest types
Web Developer ( Offered by chrispederick dot com ) can make your browser slower. Adds a toolbar button with various web developer tools.
Markdown Viewer ( Offered by simov.github.io ) can make your browser slower. Render local and remote file URLs.
Explain and Send Screenshots ( Offered by jasonsavard dot com ) a little bit light, remove watermark need in-app purchases, to use it remember to activate the "Allow access to file URLs" options. Capture or record a video of your screen, write text or arrows and share it. The safest extension with NO crazy permissions!
Nimbus Screenshot & Screen Video Recorder ( Offerd by Nimbus Web Inc ) can make your browser slower. Screen Capture FULL Web page or any part. Edit screenshots. Record screencasts - record video from your screen.
Markdown Cheatsheet ( Offered by greybax ) for reference sheet. This extension shows markdown cheatsheet
LaTeX Editor ( Offered by Keller ) can make your browser slower. maybe only full functional in Google Chrome,
Link to Text Fragment ( Offered by Google LLC ) more usable in current Google Chrome. Browser extension that allows for linking to arbitrary text on a page.
Huntr: Job Search Tracker ( Offered by huntr dot co ) Collect, track and manage your job applications from across the web. Apply and autofill job applications in one click.
append-to-clipboard ( Offered by brettz9 ) Append copied text to the clipboard, optionally with separators
Accent Grid ( Offered by bat020 ) Easy access to accented letters and other special characters.
Chrome Close Lock ( Offered by Intellibyte ) Prevent Chrome from closing without warning.
Copy as Markdown ( Offered by Laxman ) Browser extension to copy hyperlinks, images, and selected text as Markdown.
Copy Real Url ( Offered by Sourya Kakarla ) Provides an option to copy the real link on Google Search, Yahoo Search, Facebook Chat and Hangouts instead of redirecting url.
Create Link ( Offered by ku ) Copy current page URL to clipboard in various formats.
Awesome View Source Button ( Offered by UpWay2Late.com Software ) for developer/technical. Awesome button to view the source in a new window or tab. If the source is already open, that tab is selected.
Beautiful Epub Reader ( Offered by Sparrow ) Makes reading an epub exactly the same as an ebook in pdf format.
Break Timer ( Offered by tomjwatson ) Enforce periodic breaks to prevent RSI / eye strain.
Copy Text Easily ( Offered by devapt dot com ) can make your browser slower. A simple and hassle free way to copy text, paragraphs, sentences and custom selections in browser.
Display Access Keys ( Offered by dharris ) Displays hint of access keys next ot the elements.
EPUBReader ( Offered by epubreader ) Read epub files directly in the browser.
Git Cheat Sheet ( Offered by themergency dot com ) for reference sheet. Handy Git cheat sheet for easy access to common Git commands and terminology
Google Docs Offline ( Offered by google dot com ) Edit, create, and view your documents, spreadsheets, and presentations — all without internet access. Note: This extension is also used to make advanced copy & paste functionality available in Google Docs, Sheets and Slides.
Google Input Tools ( Offered by Google ) can make your browser slower. Input Tools lets you type in the language of your choice.
HelpfreelyApp™ - Donation Reminder ( Offered by Help Freely Foundation ) can make your browser slower. Helpfreely.org - Users can generate funds for their favorite NGOs through online shopping, at no extra cost
MindMap Tab ( Offered by www dot eisbahn dot jp/yoichiro ) Keep your idea by drawing MindMap quickly.
Local Cache ( Offered by ) Cache ajax requests to your local machine, making page loads faster and more predictable. Not recommended for realtime online transaction.
Origin Requests Only (Firewall) ( Offered by ATCS ) Origin Requests Only block all requests that isn't from current site domain or sub domain. Preventing spy, tracking and ads.
Numbered Tabs ( Offered by Narin Luangrath ) Add a numeric prefix before the tab's title.
ownsheet for reference sheet ( Offered by Sebastian Pältz ) Markdown texts never looked so pretty before.
Page Structure Cache ( Offered by pscache dot com ) Page Structure Cache
Pic info ( Offered by blog dot idevelopweb dot site ) Gives a detailed info about the image like URL, alt text, file size and dimension
Pinterest Save Button or Save to Pinterest ( Offered by www dot pinterest dot com ) Save ideas to Pinterest.
Surfingkeys ( Offered by brookhong.github.io ) can make your browser slower. Rich shortcuts to click links/switch tabs/scroll, capture pages, use your browser like vim for productivity.
Tablockify ( Offered by Erik Häyry ) Prevent your tab to be closed or reloaded
Text Editor ( Offered by Sevina ) can make your browser slower. A free, highly customizable text and code editor extension for your browser.
TeX Math Here ( Offered by tex-math-here ) Use the TeX markup language to take math here, there, or just about anywhere that images are supported.
Table range select and copy like in Firefox! ( Offered by Javlon Sodikov ) The extension enables table range selection like in Firefox!
Upshift ( Offered by Benbuck Nason ) Allows you to quickly navigate up levels in a web site address.
Vim what? ( Offered by Shadoath ) for reference sheet. Lookup of nifty vim commands
ToDo List ( Offered by Edifear ) the simple one. A simple, intuitive, nice-loking, easy-to-use offline extension for Google Chrome which helps you to manage your simple tasks.
Special Characters ( Offered by Tabgraf ) Unicode Characters browser.
Listicle To One Page ( Offered by ben.crol17 ) Tired of listicles, Clickbait articles and next buttons? 'Listicle To One Page' is the tool you want!
Google Translate ( Offered by Google ) for reference sheet. View translations easily as you browse the web. By the Google Translate team.
GreekType - Greek Alphabet Keyboard ( Offered by iamrexthebuilder ) for reference sheet. Quickly type out Greek Alphabet characters and sentences.
VS Code Lite ( Offered by 陈海宏 ChénHǎiHóng ) can make your browser slower. Code viewer and editor for your browser, like VS Code!
Web Maker ( Offered by kushagra gour ) can make your browser slower. Text editor with preview. Blazing fast & offline playground for your web experiments.
YouYoung ( Offered by fenghun5987 ) can make your browser slower.Build a notebook using markdown editor.
Web developer common tools ( Offered by Offered by pinn.chait ) can make your browser slower. for developer An extension for common tools for web developers.
View Rendered Source ( Offered by viewrenderedsource dot com ) for developer. View source is dead. See how the browser renders a page, not just what the server sends.
Mouse Tooltip Translator ( Offered by ttop324 ) can make your browser slower. for reference sheet. Mouse Tooltip Translator translate mouseover text using google translate
MultiTabs Markdown Editor ( Offered by Park ChangUk ) can make your browser slower. Markdown Editor with Multiple Tabs.

Notes:

install and enabled the extension that you really need it, use on your own risk ( if you understand how to use these extensions, you can use in your current real task in your current job ). This posting explain and testing only in regular condition.