firefox

Web Development

Website Mirroring with Wget: A Practical Guide
ByQ A Jun 13, 2019Apr 12, 2026

Wget is a reliable command-line tool for downloading entire websites for offline viewing, archival, or testing. It preserves the full site structure—HTML, images, CSS, JavaScript—and maintains the original directory layout. Basic Mirroring Command The core command to mirror a website: wget –mirror –convert-links –adjust-extension –page-requisites –no-parent https://example.com Flag Breakdown –mirror: Enables recursive downloading with time-stamping…

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Programming Languages

Thunderbird Add-ons for Better Email Organization
ByEric Ma Jul 8, 2018Apr 12, 2026

Thunderbird’s default feature set is deliberately minimal. Addons fill critical gaps for users managing multiple accounts, large archives, or specific workflow requirements. Here are the addons that solve genuine problems. Organization and Maintenance Remove Duplicate Messages Mail folders accumulate duplicates from IMAP syncing glitches, accidental re-imports, or migrations across devices. Remove Duplicate Messages scans folders,…

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Programming Languages

Installing Flash Player on CentOS 7
ByEric Ma Mar 24, 2018Apr 13, 2026

Adobe Flash Player reached End of Life on December 31, 2020, and Adobe blocked all Flash content from executing in 2021. Installing Flash Player on CentOS 7 in 2026 is neither practical nor recommended—the plugin won’t execute Flash content anyway, and doing so introduces security vulnerabilities to your system. If you’re still running CentOS 7,…

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Programming Languages

Debugging Print Styles in Firefox: A Practical Guide
ByEric Ma Mar 24, 2018Apr 13, 2026

Webpages often render differently when printed than on screen. Firefox’s developer tools make it straightforward to preview and debug print stylesheets without wasting paper. Using the CSS Media Type Emulator The fastest way to test print styles in Firefox: Open DevTools with F12 Click the Inspector tab (usually open by default) Look for the “Emulate…

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Linux & Systems Administration

Set Google as Default Search Engine in Firefox on Linux Mint
ByEric Ma Mar 24, 2018Apr 13, 2026

Firefox ships with several search engines pre-configured, but the default varies by region and Mozilla’s partnerships. If you want Google as your primary search engine on Linux Mint, the process is straightforward. Access Firefox Search Settings Open Firefox and navigate to about:preferences#search in the address bar, or go through the menu: ☰ (hamburger menu) →…

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Linux & Systems Administration

Firefox iOS Bookmark Sync: What Actually Works in 2026
ByEric Ma Mar 24, 2018Apr 13, 2026

Firefox on iOS has improved significantly since the early days, but understanding what syncs and what doesn’t remains important for managing bookmarks across devices. Current sync capabilities As of 2026, Firefox sync does support bookmarks across iOS and desktop, but with important limitations. When you enable Firefox sync on your iOS device and link it…

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Linux & Systems Administration

Can Firefox Sync Access Your Passwords Without Your Master Password?
ByEric Ma Mar 24, 2018Apr 13, 2026

Firefox Sync requires an email address and a password to function. The critical question: if someone gains access to your Firefox account or device, can they read your synced passwords without knowing your master password? The short answer: no. Only you with your password can decrypt your synced data. Mozilla’s servers cannot access your encrypted…

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Linux & Systems Administration

Running Multiple Firefox Profiles at the Same Time
ByEric Ma Mar 24, 2018Apr 13, 2026

Firefox uses a profile system to isolate settings, extensions, bookmarks, and browsing data. By default, Firefox only allows one instance per profile to run at a time—new instances redirect to the existing process. If you need multiple Firefox windows with different profiles open at once, you need to disable this behavior. The -no-remote Flag The…

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Systems & Architecture

Accessing Self-Signed SSL Certificates in Chrome on iOS
ByEric Ma Mar 24, 2018Apr 13, 2026

Chrome on iOS has a fundamental limitation: it cannot accept self-signed SSL certificates or custom Certificate Authorities (CAs) because iOS restricts all browsers to use the system’s certificate validation. Unlike desktop Chrome, you cannot bypass this through browser settings. Why This Limitation Exists iOS enforces strict security policies where all apps—including Chrome, Safari, and Firefox—must…

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Linux & Systems Administration

Capturing RTMP Streams on Linux: A Practical Guide
ByEric Ma Mar 24, 2018Apr 13, 2026

RTMP (Real Time Messaging Protocol) streams are still used for live broadcasts and on-demand video delivery, though less commonly than HLS or DASH. If you need to capture an RTMP stream, there are several solid tools available on Linux. Using ffmpeg (recommended) ffmpeg is the modern standard for working with RTMP streams. It’s widely available,…

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Linux & Systems Administration

Installing and Configuring a PDF Reader on Linux Mint
ByEric Ma Mar 24, 2018Apr 13, 2026

Adobe Reader (acroread) is rarely the best choice for Linux users anymore. It’s unmaintained, doesn’t receive security updates, and performs poorly compared to modern alternatives. This guide covers better options and how to set up a functional PDF viewer on Linux Mint. Why Not Adobe Reader? Adobe stopped supporting Reader for Linux in 2013. The…

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Linux & Systems Administration

Download YouTube Videos with yt-dlp
ByEric Ma Mar 24, 2018Apr 12, 2026

The most reliable way to download YouTube videos is yt-dlp, a maintained fork of youtube-dl that handles modern YouTube changes and DRM protections. It works on Linux, macOS, and Windows. Installation Linux (Debian/Ubuntu): sudo apt install yt-dlp Linux (Fedora/RHEL): sudo dnf install yt-dlp macOS: brew install yt-dlp Windows or any system with Python 3.8+: pip…

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Linux & Systems Administration

Adding Multiple window.onload Handlers Without Conflicts
ByEric Ma Mar 24, 2018Apr 13, 2026

Direct assignment to window.onload overwrites any existing handler. If a plugin, library, or another script has already set a handler, your code will replace it completely: // Plugin sets this window.onload = function() { initializePlugin(); } // Your code overwrites it window.onload = function() { doMyWork(); } // Result: initializePlugin() never runs This breaks plugins…

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Linux & Systems Administration

Running Chrome Over SSH With X11 Forwarding: Issues and Alternatives
ByEric Ma Mar 24, 2018Apr 13, 2026

X11 forwarding lets you run Chrome on a remote host and display it on your local machine. It’s quick to set up for occasional use, but for regular work or modern Linux systems, you’ll want to know when to use alternatives. Basic X11 Forwarding The simplest approach uses SSH’s X11 forwarding: ssh -X username@remote_host google-chrome…

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Linux & Systems Administration

Playing Flash Files on Linux in 2026
ByEric Ma Mar 24, 2018Apr 13, 2026

Flash support ended in December 2020, and Adobe no longer distributes Flash Player. Most browsers dropped Flash entirely. If you’re stuck with legacy .swf files, here’s what actually works. Ruffle: Your Best Option Ruffle is the go-to solution. It’s an open-source Flash emulator written in Rust that handles most SWF files without needing Adobe’s player….

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Databases & Storage

Clear Cached Redirects in Chrome: A Developer’s Guide
ByEric Ma Mar 24, 2018Apr 12, 2026

Chrome aggressively caches HTTP redirects—especially 301 (permanent) and 308 redirects—as a performance optimization. The cache persists across browser sessions, which causes real problems when you’ve updated redirect rules and need to test them immediately. Understanding Chrome’s Redirect Cache Behavior Chrome stores redirect information at the browser level, separate from typical page caches. This means: 301…

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Web Development

Fetching Webpages as a Mobile Browser Using curl
ByEric Ma Mar 24, 2018Apr 12, 2026

You can fetch a webpage as if you’re requesting from a mobile device by setting curl’s User-Agent header to match a mobile browser. Remote servers use the User-Agent header to decide whether to serve mobile or desktop versions of pages. Basic syntax Use the -A (or –user-agent) flag to specify a mobile User-Agent string: curl…

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Web Development

Responsive CSS Loading with Media Queries and @import
ByEric Ma Mar 24, 2018Apr 13, 2026

You can use @import with media queries to conditionally load CSS files only for specific viewport sizes. This is useful for loading layout-specific stylesheets, web fonts, or icon libraries only when needed. Basic Syntax The general format is: @import url(‘path/to/file.css’) media-query; The media query parameter controls when the stylesheet loads. Here are practical examples: /*…

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Linux & Systems Administration

Installing Java Runtime Environment on Linux x86-64
ByQ A Mar 24, 2018Apr 12, 2026

Java Runtime Environment (JRE) is required to run Java applications on Linux. On x86-64 systems, you have several installation options ranging from open-source to Oracle’s commercial builds. Install OpenJDK (Recommended) OpenJDK is the open-source implementation and is available in all major Linux distributions: # Fedora / RHEL / Rocky Linux sudo dnf install java-17-openjdk #…

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Linux & Systems Administration

How to Remove Multiple Items from Your Kindle Library
ByQ A Mar 24, 2018Apr 12, 2026

Amazon’s Kindle Library web interface forces you to delete books one at a time through the UI. If you’ve accumulated hundreds of items, this becomes tedious. Here are practical approaches to bulk-delete from your Kindle Library. Browser Console Method The most straightforward approach uses your browser’s developer console to run deletion scripts directly against Amazon’s…

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