hello, could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this might give us a clue what is going on...

philipp said

hello, could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this might give us a clue what is going on...

Troubleshooting Information This page contains technical information that might be useful when you're trying to solve a problem. If you are looking for answers to common questions about Firefox, check out our support website. Application Basics Name Firefox Version 34.0.5 Update History User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Profile Folder Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Multiprocess Windows 0/1 Crash Reports for the Last 3 Days Report ID Submitted

All Crash Reports Extensions Name Version Enabled ID Graphics Adapter Description Intel(R) HD Graphics Adapter Drivers igdumd64 igd10umd64 igd10umd64 igdumd32 igd10umd32 igd10umd32 Adapter RAM Unknown Device ID 0x0156 Direct2D Enabled true DirectWrite Enabled true (6.2.9200.16571) Driver Date 3-8-2013 Driver Version 9.17.10.3062 GPU #2 Active false GPU Accelerated Windows 1/1 Direct3D 11 (OMTC) Subsys ID 00000000 Vendor ID 0x8086 WebGL Renderer Google Inc. -- ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote true AzureCanvasBackend direct2d AzureContentBackend direct2d AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0 Important Modified Preferences Name Value browser.cache.disk.capacity 358400 browser.cache.disk.smart_size.first_run false browser.cache.frecency_experiment 4 browser.places.smartBookmarksVersion 7 browser.sessionstore.upgradeBackup.latestBuildID 20141126041045 browser.startup.homepage https://www.google.com/?gws_rd=ssl browser.startup.homepage_override.buildID 20141126041045 browser.startup.homepage_override.mstone 34.0.5 dom.mozApps.used true extensions.lastAppVersion 34.0.5 gfx.direct3d.last_used_feature_level_idx 0 media.gmp-gmpopenh264.lastUpdate 1418416680 media.gmp-gmpopenh264.version 1.1 media.gmp-manager.lastCheck 1418754988 network.cookie.prefsMigrated true places.database.lastMaintenance 1418735319 places.history.expiration.transient_current_max_pages 104649 plugin.disable_full_page_plugin_for_types application/pdf plugin.importedState true print.printer_Lexmark_T632_(MS).print_bgcolor false print.printer_Lexmark_T632_(MS).print_bgimages false print.printer_Lexmark_T632_(MS).print_colorspace print.printer_Lexmark_T632_(MS).print_command print.printer_Lexmark_T632_(MS).print_downloadfonts false print.printer_Lexmark_T632_(MS).print_duplex 1515870810 print.printer_Lexmark_T632_(MS).print_edge_bottom 0 print.printer_Lexmark_T632_(MS).print_edge_left 0 print.printer_Lexmark_T632_(MS).print_edge_right 0 print.printer_Lexmark_T632_(MS).print_edge_top 0 print.printer_Lexmark_T632_(MS).print_evenpages true print.printer_Lexmark_T632_(MS).print_footercenter print.printer_Lexmark_T632_(MS).print_footerleft &PT print.printer_Lexmark_T632_(MS).print_footerright &D print.printer_Lexmark_T632_(MS).print_headercenter print.printer_Lexmark_T632_(MS).print_headerleft &T print.printer_Lexmark_T632_(MS).print_headerright &U print.printer_Lexmark_T632_(MS).print_in_color true print.printer_Lexmark_T632_(MS).print_margin_bottom 0.5 print.printer_Lexmark_T632_(MS).print_margin_left 0.5 print.printer_Lexmark_T632_(MS).print_margin_right 0.5 print.printer_Lexmark_T632_(MS).print_margin_top 0.5 print.printer_Lexmark_T632_(MS).print_oddpages true print.printer_Lexmark_T632_(MS).print_orientation 0 print.printer_Lexmark_T632_(MS).print_page_delay 50 print.printer_Lexmark_T632_(MS).print_paper_data 1 print.printer_Lexmark_T632_(MS).print_paper_height 11.00 print.printer_Lexmark_T632_(MS).print_paper_name print.printer_Lexmark_T632_(MS).print_paper_size_type 0 print.printer_Lexmark_T632_(MS).print_paper_size_unit 0 print.printer_Lexmark_T632_(MS).print_paper_width 8.50 print.printer_Lexmark_T632_(MS).print_plex_name print.printer_Lexmark_T632_(MS).print_resolution 1515870810 print.printer_Lexmark_T632_(MS).print_resolution_name print.printer_Lexmark_T632_(MS).print_reversed false print.printer_Lexmark_T632_(MS).print_scaling 1.00 print.printer_Lexmark_T632_(MS).print_shrink_to_fit true print.printer_Lexmark_T632_(MS).print_to_file false print.printer_Lexmark_T632_(MS).print_unwriteable_margin_bottom 0 print.printer_Lexmark_T632_(MS).print_unwriteable_margin_left 0 print.printer_Lexmark_T632_(MS).print_unwriteable_margin_right 0 print.printer_Lexmark_T632_(MS).print_unwriteable_margin_top 0 privacy.sanitize.migrateFx3Prefs true storage.vacuum.last.index 1 storage.vacuum.last.places.sqlite 1418421128 Important Locked Preferences Name Value JavaScript Incremental GC true Accessibility Activated true Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.10.7 4.10.7 NSS 3.17.2 Basic ECC 3.17.2 Basic ECC NSSSMIME 3.17.2 Basic ECC 3.17.2 Basic ECC NSSSSL 3.17.2 Basic ECC 3.17.2 Basic ECC NSSUTIL 3.17.2 3.17.2 Experimental Features Name ID Description Active End

great thanks! does this article apply to your situation and help you to resolve it: Wrong home page opens when I start Firefox - How to fix

otherwise please run a full scan of your system with different security tools like the free version of malwarebytes & adwcleaner, which are specialised in adware and browser hijackers.

Troubleshoot Firefox issues caused by malware

The linked article gave me an idea and it worked! I went into the menu--> options--> search, and it was right there in front of me...my default search engine was set as Yahoo. Even though my homepage was set to Google, when I typed something into the Google search bar Yahoo hijacked it and showed their results.

I can change back to Google all I want but when I go to use a search again there it is again - Yahoo

Alan Sheppard